fix modifier key order, add EU badge template icons, rename build scripts

- fix modifier key order to Apple canonical: Option+Shift (not Shift+Option)
  across parser, validator, PDF generator, website keyboard viewer, README
- add EU badge template icons for v1.2/v1.3/v1.4 matching Apple's built-in
  keyboard layout icon style (edge-to-edge rounded square, text knockout)
- add build-icons.sh to generate .icns from SVG source via rsvg-convert
- rename create-dmg.sh → build-dmg.sh, update CI workflows
- add website feature icons (install, pdf, versions)
- update website icon to star-on-key design

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/release.yml

@@ -26,7 +26,7 @@ jobs:
         run: bash scripts/build-bundle.sh --version "${{ steps.version.outputs.version }}"
 
       - name: create DMG
-        run: bash scripts/create-dmg.sh --version "${{ steps.version.outputs.version }}"
+        run: bash scripts/build-dmg.sh --version "${{ steps.version.outputs.version }}"
 
       - name: create GitHub release
         uses: softprops/action-gh-release@v2