W3: lib-knowledge-ui scaffold + collections

@crema/knowledge-ui: headless KB management components over an injected
KnowledgeTransport. This commit: package + types (full API surface) +
transport interface + MockKnowledgeTransport (fixtures for every surface) +
_internal (cn, badges, formatters) + components-collections (CollectionList
grouped by owner, CollectionCard, CollectionForm with org/read-only states) +
demo + README + tsconfig.check.json. Typechecks clean.

Co-Authored-By: Claude Fable 5 (build) <noreply@anthropic.com>

tsconfig.check.json

@@ -0,0 +1,24 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"],
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "jsx": "react-jsx",
+    "strict": true,
+    "noEmit": true,
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowImportingTsExtensions": true,
+    "baseUrl": ".",
+    "types": [],
+    "paths": {
+      "react": ["../arcadia-personal-cloud-web/node_modules/@types/react/index.d.ts"],
+      "react/jsx-runtime": ["../arcadia-personal-cloud-web/node_modules/@types/react/jsx-runtime.d.ts"],
+      "react-dom": ["../arcadia-personal-cloud-web/node_modules/@types/react-dom/index.d.ts"],
+      "lucide-react": ["../arcadia-personal-cloud-web/node_modules/lucide-react/dist/lucide-react.d.ts"],
+      "@crema/file-ui": ["../lib-file-ui/src/index.tsx"]
+    }
+  },
+  "include": ["src", "demo"]
+}