chore: bump version to 0.2.0 for Artifact Hub

Update version metadata to 0.2.0 in preparation for Artifact Hub release.

Changes:
- package.json: 0.1.0 → 0.2.0
- artifacthub-pkg.yml: version and appVersion 0.1.0 → 0.2.0
- Enhanced description to highlight WCAG 2.1 AA accessibility

This version includes:
- Phase 1: Type-safe error handling (Result types, branded types, validators, retry logic)
- Phase 2: UX improvements (cert expiry warnings, health checks, RBAC, API version detection)
- Phase 3: Performance optimizations (React.memo, debouncing, lazy loading)
- Phase 4.1: Unit tests (36/39 passing - types, retry, validators)

Artifact Hub will pick up this version on next scan.

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>

headlamp-sealed-secrets/package.json

@@ -1,6 +1,6 @@
 {
   "name": "headlamp-sealed-secrets",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Headlamp plugin for Bitnami Sealed Secrets - manage encrypted Kubernetes secrets",
   "main": "dist/main.js",
   "files": [