Epic: Implement Debug Adapter Protocol (DAP) Support

[ztripez]

Summary

This epic tracks the implementation of the Debug Adapter Protocol (DAP) for the Continuum DSL. It allows developers to interactively debug simulations using IDEs like VS Code.

Accomplishments

• cdsl-dap Crate: Implementation of the DAP JSON-RPC wire protocol and server.
• Runtime Debug Hooks: Added yield/pause capability to the Level-based executor and execute_until_breakpoint() support.
• Symbol Mapping: Automatic mapping of line breakpoints to internal SignalIds using IR metadata.
• Hierarchical Inspection: Support for viewing Global Signals, Era Configuration, and Entity Populations (including instances and fields) in the IDE.
• Stepping: Support for "Next" (Step Over Phase) and "Continue" (Run to next breakpoint/tick).
• VS Code Integration: Updated vscode-cdsl extension to register the debugger and launch the DAP server.

Future Work

• Data Breakpoints: Pausing based on complex conditions (integrating with the Fracture system).
• Operator-level stepping: Stepping into individual operator bodies.
• Expression Evaluation: Support for evaluate requests in the debug console.

Related

Part of the Unified Compiler Payoff (#225).