refactor: migrate testing framework from Karma/Jasmine to Vitest with Angular support

src/test-setup.ts

@@ -0,0 +1,21 @@
+import '@angular/compiler';
+import { vi } from 'vitest';
+import '@analogjs/vitest-angular/setup-snapshots';
+import '@analogjs/vitest-angular/setup-serializers';
+import { setupTestBed } from '@analogjs/vitest-angular/setup-testbed';
+
+setupTestBed();
+
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: vi.fn().mockImplementation((query: string) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: vi.fn(),
+    removeListener: vi.fn(),
+    addEventListener: vi.fn(),
+    removeEventListener: vi.fn(),
+    dispatchEvent: vi.fn(),
+  })),
+});