Add Swisscom SDX integration and update project configuration

- Updated angular.json to include new asset paths and styles for Swisscom SDX.
- Modified package.json and package-lock.json to add @swisscom/sdx dependency.
- Enhanced app.ts to include CUSTOM_ELEMENTS_SCHEMA for custom elements.
- Updated main.ts to define custom elements from Swisscom SDX.

package.json

@@ -29,6 +29,7 @@
     "@angular/forms": "^21.0.0",
     "@angular/platform-browser": "^21.0.0",
     "@angular/router": "^21.0.0",
+    "@swisscom/sdx": "^3.3.0",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0"
   },
@@ -40,4 +41,4 @@
     "typescript": "~5.9.2",
     "vitest": "^4.0.8"
   }
-}
+}