opt(hertz): remove old SSE docs and add new example link

Author: AsterDY

content/en/docs/hertz/tutorials/basic-feature/sse.md

@@ -83,6 +83,9 @@ func HandleSSE(ctx context.Context, resp *protocol.Response) error {
 }
 ```
 
+### Example Codes
+- [SSE](https://github.com/cloudwego/hertz-examples/tree/main/sse) : Example of hertz using SSE protocol
+
 ### Common Issues
 
 #### How to implement multi-level SSE / SSE Proxy?

content/en/docs/hertz/tutorials/example/_index.md

@@ -51,7 +51,7 @@ Hertz provides a series of code examples designed to help users get start with H
 - [HTTP2](https://github.com/hertz-contrib/http2/tree/main/examples) : Example of hertz using HTTP2 protocol
 - [HTTP3](https://github.com/hertz-contrib/http3/tree/main/examples/quic-go) : Example of hertz using HTTP3 protocol
 - [Websocket](https://github.com/hertz-contrib/websocket/tree/main/examples) : Example of hertz using Websocket protocol
-- [SSE](https://github.com/hertz-contrib/sse/tree/main/examples) : Example of hertz using SSE protocol
+- [SSE](https://github.com/cloudwego/hertz-examples/tree/main/sse) : Example of hertz using SSE protocol
 
 ### Route
 

content/en/docs/hertz/tutorials/framework-exten/response_writer.md

@@ -10,8 +10,7 @@ description: "Response Writer Extension provided by Hertz."
 According to Hertz's [layered architecture](/zh/docs/hertz/overview/), the actual write
 operation of the HTTP response is performed after the application layer user processing logic returns. Under this
 constraint, users cannot flexibly control the behavior of write operations on demand. This limitation is especially
-obvious in scenarios such as controlling chunked encoding write logic
-and [SSE](https://github.com/hertz-contrib/sse#hertz-sse).
+obvious in scenarios such as controlling chunked encoding write logic.
 
 To solve this problem, Hertz provides an extension called "Response Writer Hijacking" that can vertically penetrate the
 limitations brought by the layered architecture in an orthogonal way. It allows users to freely customize the logic of