chore: Add pre-commit check to sync api spec docs

It will fail if the newly generated spec docs are different.

Signed-off-by: Ihar Hrachyshka <ihar.hrachyshka@gmail.com>

.pre-commit-config.yaml

@@ -82,6 +82,17 @@ repos:
         require_serial: true
         files: ^llama_stack/templates/.*$|^llama_stack/providers/.*/inference/.*/models\.py$
 
+-   repo: local
+    hooks:
+      - id: openapi-codegen
+        name: API Spec Codegen
+        additional_dependencies:
+          - uv==0.6.2
+        entry: sh -c 'uv run --with ".[dev]" ./docs/openapi_generator/run_openapi_generator.sh > /dev/null 2>&1'
+        language: python
+        pass_filenames: false
+        require_serial: true
+
 ci:
     autofix_commit_msg: 🎨 [pre-commit.ci] Auto format from pre-commit.com hooks
     autoupdate_commit_msg: ⬆ [pre-commit.ci] pre-commit autoupdate