document how to debug TypeScript in vscode

closes oxc-project/oxc#3732

Author: Boshen

src/docs/contribute/debugging.md

@@ -31,3 +31,12 @@ rust-lldb -- ./target/release/oxlint
 ```
 
 Once it launches, press `r` for running the program.
+
+## Debug TypeScript in VSCode
+
+According to their [debugging guide](https://github.com/microsoft/TypeScript/blob/main/CONTRIBUTING.md#debugging-the-tests), in the TypeScript repository:
+
+- rename `.vscode/launch.template.json` to `launch.json`
+- set a breakpoint somewhere in TypeScript's source code
+- create a `test.ts` or open any test file of interest
+- From the menu "Run - Debugging", or press F5