refactor: refactor tool macros and router implementation (#261)

* refactor: refactor tool macros and router implementation

- Updated the `#[tool(tool_box)]` macro to `#[tool_router]` across various modules for consistency.
- Enhanced the `Calculator`, `Counter`, and `GenericService` structs to utilize `ToolRouter` for handling tool calls.
- Introduced `Parameters` struct for better parameter handling in tool functions.
- Added new methods for listing tools and calling tools in server handlers.
- Improved test cases to reflect changes in tool routing and parameter handling.
- Updated documentation and examples to align with the new router structure.

* fix: fix fmt and build error

* fix: fix test failure

* docs: documents for macros, fix ci

* fix: fix ci

* fix: fix wrongly replaced documents

* fix: remove useless file

* fix: change the parameter format for tool_router

* fix: update extract_doc_line to handle existing documentation and clean up unused code in server handler

* doc: update document for macro and examples

* doc: update readme and add contribute guide

* fix: fix type

examples/transport/src/tcp.rs

@@ -13,7 +13,7 @@ async fn server() -> anyhow::Result<()> {
     let tcp_listener = tokio::net::TcpListener::bind("127.0.0.1:8001").await?;
     while let Ok((stream, _)) = tcp_listener.accept().await {
         tokio::spawn(async move {
-            let server = serve_server(Calculator, stream).await?;
+            let server = serve_server(Calculator::new(), stream).await?;
             server.waiting().await?;
             anyhow::Ok(())
         });