tdlv: add doc

Author: phuongdnguyen

custom-debugger/README.md

@@ -0,0 +1,45 @@
+# Custom Debugger
+
+A multi-language debugger for Temporal workflows that supports Go, Python, and JavaScript.
+
+## Overview
+
+The custom debugger provides debugging capabilities for Temporal workflows by:
+- Starting appropriate language-specific debuggers (Delve for Go, DebugPy for Python, JS Debug for JavaScript)
+- Acting as a proxy between IDEs and language debuggers
+- Supporting both DAP (Debug Adapter Protocol) and JSON-RPC protocols
+- Enabling workflow debugging from history files
+
+## Usage
+
+```bash
+# Start with default settings (Go language, port 60000)
+./custom-debugger
+
+# Specify language and port
+./custom-debugger -lang python -p 60001
+
+# Auto-install missing debuggers
+./custom-debugger -lang js -install
+
+# Suppress dependency check messages
+./custom-debugger -quiet
+```
+
+## Supported Languages
+
+- **Go**: Uses Delve debugger
+- **Python**: Uses DebugPy debugger  
+- **JavaScript**: Uses VS Code JS Debug
+
+## Ports
+
+- **60000**: Main debugger proxy port (configurable with `-p`)
+- **2345**: Language-specific debugger port
+
+## Dependencies
+
+The debugger automatically checks for and can install required language-specific debuggers:
+- Delve for Go workflows
+- DebugPy for Python workflows  
+- JS Debug for JavaScript workflows