Initial release: Headlamp Sealed Secrets plugin v0.1.0

Features:
- Complete SealedSecret CRD integration with Headlamp
- Client-side encryption using controller's public key
- Support for all three scoping modes (strict, namespace-wide, cluster-wide)
- List and detail views for SealedSecrets
- Encryption dialog for creating new SealedSecrets
- Decryption support with RBAC awareness
- Sealing keys management
- Settings page for controller configuration
- Integration with Secret detail view

Technical:
- Full TypeScript with strict mode
- ~1,345 lines of code
- Build size: 339.42 kB (93.21 kB gzipped)
- Compatible with Headlamp v0.13.0+
- Apache 2.0 license

Security:
- All encryption performed client-side
- RSA-OAEP + AES-256-GCM (kubeseal-compatible)
- Auto-hide decrypted values after 30 seconds

Closes: Initial implementation

headlamp-sealed-secrets/tsconfig.json

@@ -0,0 +1,4 @@
+{
+  "extends": "./node_modules/@kinvolk/headlamp-plugin/config/plugins-tsconfig.json",
+  "include": ["./src/**/*"]
+}