Implements the directory blacklist feature from #660 (incomplete items 3-4).
Users can now configure directories to exclude from the @ file picker
and fuzzy search via settings.json:
{ "searchExcludeDirs": ["node_modules", ".git", "dist", "build"] }
Changes:
- settings-manager.ts: added searchExcludeDirs setting with get/set
- autocomplete.ts (pi-tui): CombinedAutocompleteProvider accepts
excludeDirs option, filters excluded directory names in both
readdir-based and native fuzzy search paths
- interactive-mode.ts: passes searchExcludeDirs to the provider
The native fd fuzzy search already respects .gitignore. This setting
covers directories that aren't gitignored but shouldn't appear in
autocomplete (e.g., large vendor dirs, build outputs in projects
without comprehensive .gitignore).
Fixes#1190
0f97f938f7