feat(tools): add debug_restart, debug_attach, and debug_get_threads tools

[CalvinAllen]

Description

Add missing debugger tools for restarting, attaching to processes, and thread inspection.

Tools to Implement

Tool	Description
debug_restart	Restart the current debug session
debug_attach	Attach debugger to a running process by name or PID
debug_get_threads	Get all threads in the current debug session

Notes

• Extends existing debugger tools category
• Competitor reference: Unofficial VS MCP Server by dhq-boiler