plugins(files): Feature 9 — Rich file type icons
- Added FILE_ICONS lookup with SVG paths for 15 categories
- Added EXT_MAP with 70+ extension-to-category mappings
- Images, video, audio, archives, PDFs get distinct icons
- Documents, spreadsheets, presentations get office-style icons
- Code files (JS/Python/Go/Rust/C/etc.) get a dedicated code icon
- Database, font, config files also get proper icons
- Existing behavior preserved: folder, markdown, json->{ }, generic
- fileIcon simplified to use lookup tables
mirivlad
4a0656cd09