feat: add Echo v5 server support and example

- Add HandlerKindEchoV5 constant and IsValid() support in configuration.go
- Add echo-v5 handler, middleware, and server templates
- Add examples/server/echo-v5 standalone example with README
- Add examples/server/test/echo-v5 test case wired into server_test.go
- Add github.com/labstack/echo/v5 to examples/go.mod
- Add echo-v5 to configuration-schema.json handler kind enum
- Add echo-v5 router init test in integration_test.go

Author: Miguel Silva

configuration-schema.json

@@ -276,7 +276,7 @@
         },
         "kind": {
           "type": "string",
-          "enum": ["beego", "chi", "echo", "fasthttp", "fiber", "gin", "goframe", "go-zero", "gorilla-mux", "hertz", "iris", "kratos", "std-http"],
+          "enum": ["beego", "chi", "echo", "echo-v5", "fasthttp", "fiber", "gin", "goframe", "go-zero", "gorilla-mux", "hertz", "iris", "kratos", "std-http"],
           "description": "Router/framework to generate for. Required."
         },
         "models-package-alias": {

examples/go.mod

@@ -86,6 +86,7 @@ require (
 	github.com/kataras/tunnel v0.0.4 // indirect
 	github.com/klauspost/compress v1.18.4 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/labstack/echo/v5 v5.1.0 // indirect
 	github.com/labstack/gommon v0.4.2 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect
 	github.com/magiconair/properties v1.8.10 // indirect

examples/go.sum

@@ -181,6 +181,8 @@ github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/labstack/echo/v4 v4.15.0 h1:hoRTKWcnR5STXZFe9BmYun9AMTNeSbjHi2vtDuADJ24=
 github.com/labstack/echo/v4 v4.15.0/go.mod h1:xmw1clThob0BSVRX1CRQkGQ/vjwcpOMjQZSZa9fKA/c=
+github.com/labstack/echo/v5 v5.1.0 h1:MvIRydoN+p9cx/zq8Lff6YXqUW2ZaEsOMISzEGSMrBI=
+github.com/labstack/echo/v5 v5.1.0/go.mod h1:SyvlSdObGjRXeQfCCXW/sybkZdOOQZBmpKF0bvALaeo=
 github.com/labstack/gommon v0.4.2 h1:F8qTUNXgG1+6WQmqoUWnz8WiEU60mXVVw0P4ht1WRA0=
 github.com/labstack/gommon v0.4.2/go.mod h1:QlUFxVM+SNXhDL/Z7YhocGIBYOiwB0mXm1+1bAPHPyU=
 github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=

examples/server/echo-v5/README.md

@@ -0,0 +1,70 @@
+# Echo v5 Server Example
+
+This example demonstrates server code generation using [Echo v5](https://github.com/labstack/echo), a high-performance, minimalist Go web framework.
+
+## Description
+
+- Echo v5 uses `echo.MiddlewareFunc` for middleware (handler signature changed to `func(c *echo.Context) error`)
+- Path parameters are extracted via `c.PathParam("paramName")`
+- Echo v5 uses a pointer receiver `*echo.Context` instead of the v4 interface
+- Built-in middleware available: `middleware.Recover()`, `middleware.Logger()`, `middleware.CORS()`, etc.
+- Graceful shutdown is handled via `echo.StartConfig.Start(ctx, e)`
+
+## Integrating with Existing Server
+
+If you already have an Echo v5 instance, register the generated routes:
+
+```go
+import handler "your/module/api"
+
+svc := handler.NewService()
+handler.NewRouter(e, svc)
+```
+
+## Running the Server
+
+```bash
+go run ./server
+```
+
+The server starts on port 8080.
+
+## API Endpoints
+
+### Health Check
+
+```bash
+curl http://localhost:8080/health
+```
+
+### List Users
+
+```bash
+curl http://localhost:8080/users
+```
+
+With optional limit parameter:
+
+```bash
+curl "http://localhost:8080/users?limit=10"
+```
+
+### Create User
+
+```bash
+curl -X POST http://localhost:8080/users \
+  -H "Content-Type: application/json" \
+  -d '{"name": "John Doe", "email": "john@example.com"}'
+```
+
+### Get User by ID
+
+```bash
+curl http://localhost:8080/users/123
+```
+
+### Delete User
+
+```bash
+curl -X DELETE http://localhost:8080/users/123
+```