feat(examples): worked example for typed api blocks

- Add examples/basic-app/app/api/directory.ts and app/pages/api-block-demo.wrn
  as the end-to-end worked example for typed api blocks (Task 6).
- Add **/*.generated.api-checks.ts to .prettierignore: this generated file
  must match the CLI's raw output byte-for-byte for check:generated-types,
  and prettier was reformatting it.
- Fix packages/csr/test/api-call.test.ts: no-unsafe-function-type lint error
  from the raw Function type, uncovered while running the full gate.
- Rebuild editors/vscode bundles (packages/compiler and packages/syntax
  changed in Tasks 1-5).
- Regenerate docs/public-api-0.8.json (additive: isIdentPart, isIdentStart,
  skipLiteralOrComment newly exported from packages/syntax).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

packages/csr/test/api-call.test.ts

@@ -37,7 +37,8 @@ function harness(response: { status: number; payload: unknown }) {
   };
 
   (0, eval)(REACTIVE_RUNTIME);
-  const callApi = (win as unknown as { __wrnexusCallApi: Function }).__wrnexusCallApi;
+  const callApi = (win as unknown as { __wrnexusCallApi: (...args: any[]) => Promise<any> })
+    .__wrnexusCallApi;
   return { callApi, calls, win };
 }