intrinsics examples: xgrammar import error

[HendrikStrobelt]

When running examples from docs/examples/intrinsics/ .. an import error is thrown:

...
File "/Users/hen/Coding/2025_mellea/mellea/mellea/backends/huggingface.py", line 250, in generate_from_context
    mot = await self._generate_from_intrinsic(
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/hen/Coding/2025_mellea/mellea/mellea/backends/huggingface.py", line 368, in _generate_from_intrinsic
    granite_common.util.chat_completion_request_to_transformers_inputs(  # type: ignore
  File "/Users/hen/Coding/2025_mellea/mellea/.venv/lib/python3.12/site-packages/granite_common/util.py", line 200, in chat_completion_request_to_transformers_inputs
    import xgrammar as xgr
ModuleNotFoundError: No module named 'xgrammar'

I am unsure why this is not installed when installing granite-common. Might be in the granite-common ballpark.