Update plugin configuration and usage documentation

Clarified that plugins can be specified as instances or package names in the configuration. Expanded the plugins guide to explain both loading methods and added instructions for creating and publishing plugin packages.

Author: hotlong

docs/guide/configuration.md

@@ -35,8 +35,8 @@ A list of NPM packages to load as presets.
 ObjectQL will try to resolve the package and load schema files from its directory.
 Useful for sharing common business objects (User, Role, File, etc.).
 
-### `plugins` (ObjectQLPlugin[])
-A list of plugin instances to extend the core functionality.
+### `plugins` ((ObjectQLPlugin | string)[])
+A list of plugin instances OR package names to extend the core functionality.
 See [Plugin System](./plugins.html) for details.
 
 ### `objects` (Record<string, ObjectConfig>)

docs/guide/plugins.md

@@ -73,6 +73,10 @@ export class SoftDeletePlugin implements ObjectQLPlugin {
 
 ## Usage
 
+Plugins can be loaded in two ways: by instance or by package name.
+
+### 1. By Instance (Local Development)
+
 ```typescript
 const db = new ObjectQL({
     connection: 'sqlite://data.db',
@@ -81,3 +85,44 @@ const db = new ObjectQL({
     ]
 });
 ```
+
+### 2. By Package Name (Distribution)
+
+If you have installed a plugin via npm (e.g. `npm install @objectql/plugin-audit`), you can simply pass its name. ObjectQL will automatically resolve and instantiate it.
+
+```typescript
+const db = new ObjectQL({
+    connection: 'sqlite://data.db',
+    plugins: [
+        '@objectql/plugin-audit'
+    ]
+});
+```
+
+## Creating a Plugin Package
+
+To publish a plugin as an npm package:
+
+1.  Create a project exporting your plugin class/instance as the `default` export (or named export).
+2.  Ensure it implements `ObjectQLPlugin`.
+
+**index.ts**
+```typescript
+import { ObjectQLPlugin, IObjectQL } from '@objectql/types';
+
+export default class MyPlugin implements ObjectQLPlugin {
+    name = 'my-plugin';
+    setup(app: IObjectQL) {
+        // ...
+    }
+}
+```
+
+Then in another project:
+```bash
+npm install my-plugin-package
+```
+```typescript
+// objectql.config.ts
+plugins: ['my-plugin-package']
+```