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.

angular.json

@@ -2,7 +2,8 @@
   "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
   "version": 1,
   "cli": {
-    "packageManager": "npm"
+    "packageManager": "npm",
+    "analytics": false
   },
   "newProjectRoot": "projects",
   "projects": {
@@ -26,12 +27,11 @@
             "assets": [
               {
                 "glob": "**/*",
-                "input": "public"
+                "input": "node_modules/@swisscom/sdx/dist/js/webcomponents/webcomponents/assets",
+                "output": "assets"
               }
             ],
-            "styles": [
-              "src/styles.scss"
-            ]
+            "styles": ["node_modules/@swisscom/sdx/dist/css/webcomponents.css"]
           },
           "configurations": {
             "production": {