Remove glows, refine feature legend, forms, and showcase pages

- Delete glows.css and GlowsPage (unused)
- Enhance DTFeatureLegend and feature-legend.css with improved layout
- Update DTRadioGroup styling
- Refine bevels.css, forms-dt.css
- Update AnimationsPage, CardsAdvancedPage, FormsPage, HomePage
- Add type:module to web package.json

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/web/package.json

@@ -28,6 +28,7 @@
   "main": "dist/index.css",
   "exports": {
     ".": "./dist/index.css",
+    "./dist/index.css": "./dist/index.css",
     "./tokens/*": "./dist/tokens/*",
     "./components/*": "./dist/components/*",
     "./fonts/*": "./dist/fonts/*",