Add list of middlewares to readme including 3rd party projects (#2065)

Author: aldas

README.md

@@ -5,7 +5,6 @@
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@@ -92,10 +91,21 @@ func hello(c echo.Context) error {
 }
 ```
 
+# Third-party middlewares
+
+| Repository | Description                                                                                                                                                                                                                                                                                                                                  |
+|------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [github.com/labstack/echo-contrib](https://github.com/labstack/echo-contrib) | (by Echo team) [casbin](https://github.com/casbin/casbin), [gorilla/sessions](https://github.com/gorilla/sessions), [jaegertracing](github.com/uber/jaeger-client-go), [prometheus](https://github.com/prometheus/client_golang/), [pprof](https://pkg.go.dev/net/http/pprof), [zipkin](https://github.com/openzipkin/zipkin-go) middlewares | 
+| [deepmap/oapi-codegen](https://github.com/deepmap/oapi-codegen) | Automatically generate RESTful API documentation with [OpenAPI](https://swagger.io/specification/) Client and Server Code Generator                                                                                                                                                                                                          |
+| [github.com/swaggo/echo-swagger](https://github.com/swaggo/echo-swagger) | Automatically generate RESTful API documentation with [Swagger](https://swagger.io/) 2.0.                                                                                                                                                                                                                                                    |
+| [github.com/ziflex/lecho](https://github.com/ziflex/lecho) | [Zerolog](https://github.com/rs/zerolog) logging library wrapper for Echo logger interface.                                                                                                                                                                                                                                                  |
+| [github.com/brpaz/echozap](https://github.com/brpaz/echozap) | Uber´s [Zap](https://github.com/uber-go/zap) logging library wrapper for Echo logger interface.                                                                                                                                                                                                                                              |
+
+Please send a PR to add your own library here.
+
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