Rename provider auth/MCP contracts to remove the overloaded Runtime suffix so
the shared interfaces read as stable provider capabilities instead of execution
implementation details.
Add a consistent provider-first auth class naming convention by renaming
ClaudeAuthProvider, CodexAuthProvider, CursorAuthProvider, and GeminiAuthProvider
to ClaudeProviderAuth, CodexProviderAuth, CursorProviderAuth, and
GeminiProviderAuth.
This keeps the provider module API easier to scan and aligns auth naming with
the main provider ownership model.
- Add provider registry to manage LLM providers (Claude, Codex, Cursor, Gemini).
- Create provider routes for MCP server operations (list, upsert, delete, run).
- Implement MCP service for handling server operations and validations.
- Introduce abstract provider class and MCP provider base for shared functionality.
- Add tests for MCP server operations across different providers and scopes.
- Define shared interfaces and types for MCP functionality.
- Implement utility functions for handling JSON config files and API responses.
