chore(portal-frontend): scaffold Angular workspace

Raw `ng new` output for the Session-2 Angular portal, reachable at
/portal alongside the existing new-frontend placeholder.

portal-frontend/package.json

@@ -0,0 +1,32 @@
+{
+  "name": "portal-frontend",
+  "version": "0.0.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test"
+  },
+  "private": true,
+  "packageManager": "npm@11.12.1",
+  "dependencies": {
+    "@angular/common": "^22.1.0",
+    "@angular/compiler": "^22.1.0",
+    "@angular/core": "^22.1.0",
+    "@angular/forms": "^22.1.0",
+    "@angular/platform-browser": "^22.1.0",
+    "@angular/router": "^22.1.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0"
+  },
+  "devDependencies": {
+    "@angular/build": "^22.1.2",
+    "@angular/cli": "^22.1.2",
+    "@angular/compiler-cli": "^22.1.0",
+    "jsdom": "^28.0.0",
+    "prettier": "^3.8.1",
+    "typescript": "~6.0.2",
+    "vitest": "^4.0.8"
+  }
+}