[router] Impl radix tree and set up CI (#1893)

Co-authored-by: Lianmin Zheng <lianminzheng@gmail.com>

rust/readme.md

@@ -74,4 +74,19 @@ python -m sglang.launch_server \
 $ cargo build --release
 $ maturin build -i /usr/bin/python
 $ pip install <path to wheel>
+```
+
+
+### Development
+
+1. Run test
+
+```
+$ cargo test 
+```
+
+2. Run lint
+
+```
+$ cargo fmt
 ```