refactor: full-stack restructure with multi-tenancy, workspace management, and K8s diagnostics

- Add Workspace domain (entity, repository, service, handler, DTO)
- Add multi-tenant K8s client with tenant binding and quota management
- Add K8s diagnostics client (instance diagnostics)
- Add authorization middleware (authz package)
- Restructure frontend to feature-based architecture (features/)
- Add User Management page in configuration
- Add AccessDenied page and route guards
- Refactor shared components (form inputs, layout, UI)
- Update Tailwind config for new design system
- Add comprehensive documentation (docs/, tasks/, plans)
- Improve cluster service with better kubeconfig handling
- Add tests for crypto, config, helm client, tenant binding

frontend/package-lock.json

@@ -14,7 +14,8 @@
         "react": "^19.1.1",
         "react-dom": "^19.1.1",
         "react-router-dom": "^7.9.4",
-        "reflect-metadata": "^0.2.2"
+        "reflect-metadata": "^0.2.2",
+        "yaml": "^2.8.4"
       },
       "devDependencies": {
         "@eslint/js": "^9.36.0",
@@ -8688,16 +8689,18 @@
       "license": "ISC"
     },
     "node_modules/yaml": {
-      "version": "2.8.1",
-      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.1.tgz",
-      "integrity": "sha512-lcYcMxX2PO9XMGvAJkJ3OsNMw+/7FKes7/hgerGUYWIoWu5j/+YQqcZr5JnPZWzOsEBgMbSbiSTn/dv/69Mkpw==",
-      "dev": true,
+      "version": "2.8.4",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.8.4.tgz",
+      "integrity": "sha512-ml/JPOj9fOQK8RNnWojA67GbZ0ApXAUlN2UQclwv2eVgTgn7O9gg9o7paZWKMp4g0H3nTLtS9LVzhkpOFIKzog==",
       "license": "ISC",
       "bin": {
         "yaml": "bin.mjs"
       },
       "engines": {
         "node": ">= 14.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/eemeli"
       }
     },
     "node_modules/yargs": {