feat: initial release of headlamp-rook-ceph-plugin v0.1.0

Headlamp plugin for Rook-Ceph cluster visibility.

Pages:
- Overview dashboard: CephCluster health, capacity bar, resource counts
  (block pools, filesystems, object stores, PVs, PVCs), daemon pod
  health summary, non-Bound PVC alerts
- Block Pools: CephBlockPool table with replication, failure domain,
  mirroring; slide-in detail panel
- Pods: all Rook-Ceph daemon pods grouped by role with ready/total counts

Native Headlamp integrations:
- StorageClass table: Rook Type, Pool, Cluster ID columns
- PV table: Rook Type, Pool columns
- PVC detail injection: driver, type, pool, volume handle
- PV detail injection: CSI volume attributes
- Pod detail injection: Ceph daemon role badge
- App bar badge: cluster health (HEALTH_OK/WARN/ERR), color-coded

API / architecture:
- src/api/k8s.ts: types + filters for ceph.rook.io/v1 CRDs; handles
  both default rook-ceph.* and custom-namespace provisioner strings
- src/api/RookCephDataContext.tsx: shared context provider; fetches
  CephCluster, CephBlockPool, CephFilesystem, CephObjectStore CRDs
  plus daemon pods via label selectors
- 37 unit tests (vitest + @testing-library/react)
- TypeScript strict mode, zero any types
- CI + release GitHub Actions workflows

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

CONTRIBUTING.md

@@ -0,0 +1,34 @@
+# Contributing
+
+Contributions are welcome! Please open an issue before submitting large PRs.
+
+## Development Setup
+
+```bash
+git clone https://github.com/cpfarhood/headlamp-rook-ceph-plugin.git
+cd headlamp-rook-ceph-plugin
+npm install
+npm start   # hot-reload dev server
+```
+
+## Before Submitting
+
+```bash
+npm run tsc      # must exit 0
+npm run lint     # must exit 0
+npm test         # all tests must pass
+npm run build    # must succeed
+```
+
+## Coding Conventions
+
+- Functional React components only — no class components
+- TypeScript strict mode: no `any`, use `unknown` + type guards at API boundaries
+- All imports from `@kinvolk/headlamp-plugin/lib` and `@kinvolk/headlamp-plugin/lib/CommonComponents`
+- No additional UI libraries (no direct MUI imports, no Ant Design, etc.)
+- Context provider (`RookCephDataProvider`) wraps each route component in `index.tsx`
+- Tests: vitest + @testing-library/react, mock with `vi.mock('@kinvolk/headlamp-plugin/lib', ...)`
+
+## License
+
+By contributing, you agree your contributions will be licensed under Apache-2.0.