Initialize Angular project with config and setup files

Added initial Angular project structure including configuration files (.dockerignore, .editorconfig, .gitignore, angular.json, tsconfig), VS Code workspace settings, and application source files. This sets up the base for development, build, and testing workflows.

package.json

@@ -0,0 +1,47 @@
+{
+  "name": "playground-frontend",
+  "version": "0.0.0",
+  "scripts": {
+    "ng": "ng",
+    "start": "ng serve",
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test"
+  },
+  "prettier": {
+    "printWidth": 100,
+    "singleQuote": true,
+    "overrides": [
+      {
+        "files": "*.html",
+        "options": {
+          "parser": "angular"
+        }
+      }
+    ]
+  },
+  "private": true,
+  "dependencies": {
+    "@angular/common": "^20.3.0",
+    "@angular/compiler": "^20.3.0",
+    "@angular/core": "^20.3.0",
+    "@angular/forms": "^20.3.0",
+    "@angular/platform-browser": "^20.3.0",
+    "@angular/router": "^20.3.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0"
+  },
+  "devDependencies": {
+    "@angular/build": "^20.3.8",
+    "@angular/cli": "^20.3.8",
+    "@angular/compiler-cli": "^20.3.0",
+    "@types/jasmine": "~5.1.0",
+    "jasmine-core": "~5.9.0",
+    "karma": "~6.4.0",
+    "karma-chrome-launcher": "~3.2.0",
+    "karma-coverage": "~2.2.0",
+    "karma-jasmine": "~5.1.0",
+    "karma-jasmine-html-reporter": "~2.1.0",
+    "typescript": "~5.9.2"
+  }
+}