Release v0.0.47

Bump version to 0.0.47

- Auto-generate SCSS $icongl_map from Fantasticon output (scripts/build-font.mjs)
- Skip lucide folder (stroke-based icons don't work in glyph fonts)
- Add font demo page using actual .i .i_<name> CSS convention (exa/font_demo.html)
- Font family standardized to 'icongl' (no dot)
- 1532 icons in font, all app_* CRUD variants included