refactor: Retire the use of unmaintained custom-card-helpers (#1956)

- Closes #1295

tests/utils/fire-advanced-camera-card-event.test.ts

@@ -0,0 +1,26 @@
+import { describe, expect, it, vi } from 'vitest';
+import { fireAdvancedCameraCardEvent } from '../../src/utils/fire-advanced-camera-card-event.js';
+
+// @vitest-environment jsdom
+describe('fireAdvancedCameraCardEvent', () => {
+  it('should fire event without data', () => {
+    const element = document.createElement('div');
+    const handler = vi.fn();
+    element.addEventListener('advanced-camera-card:foo', handler);
+
+    fireAdvancedCameraCardEvent(element, 'foo');
+    expect(handler).toBeCalled();
+  });
+
+  it('should fire event with data', () => {
+    const element = document.createElement('div');
+    const data = { bar: 2 };
+    const handler = vi.fn((ev) => {
+      expect(ev.detail).toBe(data);
+    });
+
+    element.addEventListener('advanced-camera-card:foo', handler);
+    fireAdvancedCameraCardEvent(element, 'foo', data);
+    expect(handler).toBeCalled();
+  });
+});