docs: add usage guide for debugging in VSCode

.vscode/debug.md

@@ -0,0 +1,13 @@
+# Debugging in VSCode/Cursor (no Turbopack)
+
+This project includes a VSCode debug configuration using the `pwa-node` debugger.
+
+- Turbopack is disabled during debugging to ensure stable breakpoint support across platforms (especially on Windows).
+- The debugger starts Next.js in development mode using `pnpm exec next dev`.
+
+## How to Use
+
+1. Press **F5** or start debugging via the VSCode/Cursor menu (Run → Start Debugging)
+2. Set breakpoints in your code
+3. For pages/components: save the file to trigger Fast Refresh  
+   For API routes: manually re-trigger the route (e.g. in the browser), since they don’t re-run automatically on save