Adds initial support for the Debug Adapter Protocol (DAP) to
SpiderMonkey via debugger.js. This JavaScript-based implementation
enables external debuggers (e.g., VS Code) to interact with the JS
runtime using the DAP interface.
Implemented DAP requests and events:
- attach
- initialize (capabilities)
- stopped event
- threads
- scopes
- variables (globalThis pending)
- continue
- stepIn
- stepOut
- setBreakpoints
- Handling of debugger statements
This forms the foundation for interactive debugging of in-game scripts,
providing smoother integration with developer tools.
