chore: remove Webpack

It was probably only used by `@ngtools/webpack` at this point since we now use ESBuild, Vite and Vitest for building, serving, and testing, respectively.

Author: LayZeeDK

package.json

@@ -110,9 +110,7 @@
     "typescript": "^5.7.3",
     "typescript-eslint": "^8.24.0",
     "vite": "^5.4.15",
-    "vitest": "^2.1.9",
-    "webpack": "^5.98.0",
-    "webpack-cli": "^5.1.4"
+    "vitest": "^2.1.9"
   },
   "resolutions": {
     "browser-sync-client": "2.29.3",