feat: scaffold starter template with TypeScript, CRD list view, CI, ArtifactHub

Adds full plugin starter template including:
- package.json with @kinvolk/headlamp-plugin devDependency and standard scripts
- tsconfig.json extending headlamp plugin config
- vitest.config.mts + vitest.setup.ts (jsdom, NODE_ENV=test, localStorage shim)
- src/index.tsx: registers sidebar entry and route for ResourceListPage
- src/components/ResourceListPage.tsx: placeholder CRD list view with TODO guide
- src/components/ResourceListPage.test.tsx: example tests using vi.mock pattern
- .github/workflows/ci.yaml: delegates to shared plugin-ci.yaml
- .github/workflows/release.yaml: delegates to shared plugin-release.yaml
- artifacthub-pkg.yml + artifacthub-repo.yml: ArtifactHub metadata with TODO markers
- renovate.json: Mend Renovate config for weekly dependency updates
- README.md: complete getting-started guide
- CONTRIBUTING.md: local dev, code style, testing, PR process
- LICENSE: Apache-2.0

Co-Authored-By: Paperclip <noreply@paperclip.ing>

vitest.config.mts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: ['./vitest.setup.ts'],
+    exclude: ['e2e/**', 'node_modules/**'],
+    env: { NODE_ENV: 'test' },
+  },
+});