Models frequently hallucinate a 'directory' parameter alongside filePath,
causing hard failures. Instead of rejecting, accept directory as an alias
for filePath and gracefully handle when both are provided (prefer filePath).
This prevents the 'filePath and directory are mutually exclusive' error
that users hit when models pass both parameters.
Fixes model confusion with lsp_diagnostics tool parameters.
- Add isDirectoryPath helper to lsp-client-wrapper.ts
- Create directory-diagnostics.ts with aggregateDiagnosticsForDirectory
- Update diagnostics-tool.ts with extension parameter for directory paths
- Update Atlas agent prompts to use extension param for directory diagnostics
- Add unit tests for isDirectoryPath and aggregateDiagnosticsForDirectory
Fixes#2362
YeonGyu-Kim