docs: add ResponseEntity and positional param injection documentation

- Add 'Dynamic Status Codes with ResponseEntity' section to README
- Add 'Positional Parameter Injection' section to README
- Update table of contents in README
- Create annotations example (03-annotations/01-rest-controller) with
  TaskService demonstrating ResponseEntity and hyphenated params

Author: Ibrahim BinAlshikh

README.md

@@ -33,6 +33,7 @@ A powerful and flexible PHP library for creating RESTful web APIs with built-in
   - [Using Attributes (Recommended)](#using-attributes-recommended)
   - [Traditional Class-Based Approach](#traditional-class-based-approach)
 - [Parameter Management](#parameter-management)
+- [Dynamic Status Codes with ResponseEntity](#dynamic-status-codes-with-responseentity)
 
 - [Testing](#testing)
 - [Examples](#examples)
@@ -386,6 +387,63 @@ public function processRequest() {
 }
 ```
 
+### Positional Parameter Injection
+
+When using `#[ResponseBody]`, method parameters are matched **positionally** to `#[RequestParam]` attributes. The PHP variable names do not need to match the request parameter names:
+
+```php
+#[GetMapping]
+#[ResponseBody]
+#[AllowAnonymous]
+#[RequestParam('app-id', ParamType::INT)]
+#[RequestParam('user-name', ParamType::STRING, true)]
+public function getData(int $id, ?string $name): array {
+    // $id receives the value of 'app-id' (1st attribute → 1st parameter)
+    // $name receives the value of 'user-name' (2nd attribute → 2nd parameter)
+    return ['id' => $id, 'name' => $name];
+}
+```
+
+## Dynamic Status Codes with ResponseEntity
+
+The `ResponseEntity` class allows `#[ResponseBody]` methods to return different HTTP status codes based on runtime logic:
+
+```php
+use WebFiori\Http\ResponseEntity;
+use WebFiori\Json\Json;
+
+#[PostMapping]
+#[ResponseBody]
+#[AllowAnonymous]
+#[RequestParam('username', ParamType::STRING)]
+#[RequestParam('password', ParamType::STRING)]
+public function login(string $username, string $password): ResponseEntity {
+    if ($username === 'admin' && $password === 'secret') {
+        return ResponseEntity::ok(new Json(['token' => 'abc123']));
+    }
+    return ResponseEntity::unauthorized(new Json(['message' => 'Invalid credentials']));
+}
+```
+
+### Available Factory Methods
+
+| Method | Status Code | Use Case |
+|:-------|:------------|:---------|
+| `ResponseEntity::ok($body)` | 200 | Successful response |
+| `ResponseEntity::created($body)` | 201 | Resource created |
+| `ResponseEntity::noContent()` | 204 | Successful deletion |
+| `ResponseEntity::badRequest($body)` | 400 | Invalid input |
+| `ResponseEntity::unauthorized($body)` | 401 | Authentication failure |
+| `ResponseEntity::forbidden($body)` | 403 | Authorization failure |
+| `ResponseEntity::notFound($body)` | 404 | Resource not found |
+| `ResponseEntity::error($body)` | 500 | Server error |
+
+You can also use the constructor directly for custom status codes:
+
+```php
+return new ResponseEntity($body, 418, 'text/plain');
+```
+
 ## Testing
 
 ### Using APITestCase

examples/03-annotations/01-rest-controller/README.md

@@ -0,0 +1,71 @@
+# REST Controller with Annotations
+
+Demonstrates the modern annotation-based approach to building REST APIs, including parameter injection, dynamic status codes with `ResponseEntity`, and hyphenated parameter names.
+
+## What This Example Demonstrates
+
+- `#[RestController]` for service naming and description
+- `#[GetMapping]`, `#[PostMapping]`, `#[DeleteMapping]` for HTTP method routing
+- `#[ResponseBody]` for automatic return value serialization
+- `#[RequestParam]` with positional parameter injection
+- `ResponseEntity` for dynamic HTTP status codes
+- Hyphenated parameter names with arbitrary PHP variable names
+
+## Files
+
+- [`TaskService.php`](TaskService.php) - Complete CRUD service with `ResponseEntity`
+- [`index.php`](index.php) - Application entry point
+
+## How to Run
+
+```bash
+php -S localhost:8080
+```
+
+## Testing
+
+```bash
+# List all tasks
+curl "http://localhost:8080?service=tasks"
+
+# Get a specific task
+curl "http://localhost:8080?service=tasks&task-id=1"
+
+# Create a task
+curl -X POST "http://localhost:8080?service=tasks" \
+  -d "task-name=Buy groceries&task-priority=high"
+
+# Delete a task
+curl -X DELETE "http://localhost:8080?service=tasks&task-id=1"
+
+# Try to get a non-existent task (returns 404)
+curl "http://localhost:8080?service=tasks&task-id=999"
+```
+
+## Code Explanation
+
+### Positional Parameter Injection
+
+Method parameters are matched by position to `#[RequestParam]` attributes, not by name. This allows hyphenated request parameter names (WebFiori convention) with clean PHP variable names:
+
+```php
+#[RequestParam('task-id', ParamType::INT)]
+#[RequestParam('task-name', ParamType::STRING, true)]
+public function getTask(int $id, ?string $name): ResponseEntity {
+    // $id ← value of 'task-id' (1st attribute → 1st param)
+    // $name ← value of 'task-name' (2nd attribute → 2nd param)
+}
+```
+
+### Dynamic Status Codes
+
+`ResponseEntity` lets you return different HTTP status codes from the same method:
+
+```php
+public function getTask(int $id): ResponseEntity {
+    if ($id === 999) {
+        return ResponseEntity::notFound(new Json(['message' => 'Not found']));
+    }
+    return ResponseEntity::ok(new Json(['id' => $id]));
+}
+```

examples/03-annotations/01-rest-controller/TaskService.php

@@ -0,0 +1,82 @@
+<?php
+
+require_once '../../../vendor/autoload.php';
+
+use WebFiori\Http\Annotations\AllowAnonymous;
+use WebFiori\Http\Annotations\DeleteMapping;
+use WebFiori\Http\Annotations\GetMapping;
+use WebFiori\Http\Annotations\PostMapping;
+use WebFiori\Http\Annotations\RequestParam;
+use WebFiori\Http\Annotations\ResponseBody;
+use WebFiori\Http\Annotations\RestController;
+use WebFiori\Http\ParamType;
+use WebFiori\Http\ResponseEntity;
+use WebFiori\Http\WebService;
+use WebFiori\Json\Json;
+
+/**
+ * A task management service demonstrating:
+ * - Positional parameter injection with hyphenated names
+ * - Dynamic HTTP status codes via ResponseEntity
+ */
+#[RestController('tasks', 'Task management service')]
+class TaskService extends WebService {
+
+    private array $tasks = [
+        1 => ['id' => 1, 'name' => 'Write documentation', 'priority' => 'high'],
+        2 => ['id' => 2, 'name' => 'Fix bugs', 'priority' => 'medium'],
+        3 => ['id' => 3, 'name' => 'Add tests', 'priority' => 'low'],
+    ];
+
+    #[GetMapping]
+    #[ResponseBody]
+    #[AllowAnonymous]
+    #[RequestParam('task-id', ParamType::INT, true)]
+    public function getTask(?int $id): ResponseEntity {
+        if ($id === null) {
+            // Return all tasks
+            return ResponseEntity::ok(new Json(['tasks' => array_values($this->tasks)]));
+        }
+
+        if (!isset($this->tasks[$id])) {
+            return ResponseEntity::notFound(new Json(['message' => "Task $id not found"]));
+        }
+
+        return ResponseEntity::ok(new Json($this->tasks[$id]));
+    }
+
+    #[PostMapping]
+    #[ResponseBody]
+    #[AllowAnonymous]
+    #[RequestParam('task-name', ParamType::STRING)]
+    #[RequestParam('task-priority', ParamType::STRING, true)]
+    public function createTask(string $name, ?string $priority): ResponseEntity {
+        $newId = max(array_keys($this->tasks)) + 1;
+        $task = [
+            'id' => $newId,
+            'name' => $name,
+            'priority' => $priority ?? 'medium',
+        ];
+
+        return ResponseEntity::created(new Json($task));
+    }
+
+    #[DeleteMapping]
+    #[ResponseBody]
+    #[AllowAnonymous]
+    #[RequestParam('task-id', ParamType::INT)]
+    public function deleteTask(int $id): ResponseEntity {
+        if (!isset($this->tasks[$id])) {
+            return ResponseEntity::notFound(new Json(['message' => "Task $id not found"]));
+        }
+
+        return ResponseEntity::noContent();
+    }
+
+    public function isAuthorized(): bool {
+        return true;
+    }
+
+    public function processRequest() {
+    }
+}

examples/03-annotations/01-rest-controller/index.php

@@ -0,0 +1,10 @@
+<?php
+
+require_once '../../../vendor/autoload.php';
+require_once 'TaskService.php';
+
+use WebFiori\Http\WebServicesManager;
+
+$manager = new WebServicesManager();
+$manager->addService(new TaskService());
+$manager->process();