fix(copilot): Correct shell commands and skills/agents display

[jonjozwiak]

Summary

Fixed Copilot provider so that ‘Shell Commands’ and ‘Skills & Agents’ sections are now populated with data.

• Added logic to extract and normalize shell command names from both JSONL and OTel sources
• Introduced tracking and attribution of subagent types in both JSONL and OTel parsing, ensuring that only genuine subagents (not the root agent) are surfaced in the parsed output
• Extended types and interfaces to support new fields for tool arguments, subagent selection events, and span attributes, enabling the improved parsing and attribution logic
• Added tests to verify correct subagent attribution and shell command extraction

Testing

• [*] I have tested this locally against real data (not just unit tests)
• [*] npm test passes
  • NOTE: 6 tests fail, but also failed before any of my changes.
• [*] npm run build succeeds

Screenshot:

Before:

After: