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>

scripts/parse_keylayout.py

@@ -74,9 +74,9 @@ MODIFIER_LABELS = {
 	1: "Shift",
 	2: "Caps",
 	3: "Option",
-	4: "Shift+Option",
+	4: "Option+Shift",
 	5: "Caps+Option",
-	6: "Command+Option",
+	6: "Option+Command",
 	7: "Control",
 }