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>

renovate.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": ["config:recommended"],
+  "baseBranches": ["main"],
+  "schedule": ["every weekend"],
+  "prConcurrentLimit": 10,
+  "packageRules": [
+    {
+      "matchManagers": ["npm"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "groupName": "npm minor and patch"
+    },
+    {
+      "matchManagers": ["github-actions"],
+      "matchUpdateTypes": ["minor", "patch"],
+      "groupName": "github-actions minor and patch"
+    }
+  ]
+}