refactor(ci): replace mobile-specific terms with generic product terminology

🔄 Updated workflows and scripts to use product-agnostic naming:

Workflow Changes:
- 📱 Mobile Release → 📦 Product Release
- 🚨 Mobile Hotfix → 🚨 Product Hotfix
- Mobile App → Product (in descriptions)
- "mobile app" → "product" (in messages and tags)
- "pubspec.yaml" → "version file" (in user-facing text)

Display Names:
- Worker Mobile → Worker Product
- Client Mobile → Client Product
- Staff Mobile App → Staff Product (Worker)
- Client Mobile App → Client Product

Benefits:
✅ Makes workflows extensible for other product types
✅ Consistent terminology across all automation
✅ Easier to add web, backend, or other products later
✅ Keeps implementation details (paths, scripts) unchanged
✅ Maintains backward compatibility with existing tags

Note: File paths remain unchanged (apps/mobile/...) as they are implementation-specific

.github/scripts/extract-release-notes.sh

@@ -19,10 +19,10 @@ fi
 # Determine CHANGELOG path and app name
 if [ "$APP" = "worker" ]; then
   CHANGELOG_PATH="apps/mobile/apps/staff/CHANGELOG.md"
-  APP_NAME="Staff Mobile App (Worker)"
+  APP_NAME="Staff Product (Worker)"
 else
   CHANGELOG_PATH="apps/mobile/apps/client/CHANGELOG.md"
-  APP_NAME="Client Mobile App"
+  APP_NAME="Client Product"
 fi
 
 # Try to extract release notes for this version