Require huggingface_hub>=0.30.0

[SammyTourani]

Fixes #412

Raise the minimum huggingface_hub in pyproject.toml from 0.28.0 to 0.30.0. This is a
one-line change.

TimesFM_2p5_200M_torch passes paper_url to PyTorchModelHubMixin, and huggingface_hub
only accepts that keyword from 0.30.0 (huggingface/huggingface_hub#2917). With 0.28.x or
0.29.x installed, both of which the current floor allows, import timesfm fails:

TypeError: ModelHubMixin.__init_subclass__() got an unexpected keyword argument 'paper_url'

pip does not upgrade huggingface_hub in that case, because the installed version already
satisfies >=0.28.0. This is the paper_url failure reported in #412. The proxies failure
that the issue is titled after was already fixed by #435, so with this change both failures
reported there are resolved.

Verification

Command: python -m pytest tests/ src/timesfm3/ --ignore=src/timesfm3/mlx -p no:cacheprovider -q
(fresh Python 3.11 venv, run once per huggingface_hub version)

Result:

• huggingface_hub 0.29.3, allowed by the current floor: Interrupted: 3 errors during collection, 0 tests run. The collection errors are
  TypeError: ModelHubMixin.__init_subclass__() got an unexpected keyword argument 'paper_url'
  (tests/test_base_utils.py, tests/test_force_flip_invariance.py) and a follow-on
  KeyError: 'timesfm' (tests/test_model_loading.py).
• huggingface_hub 0.30.0, the new floor: 114 passed
• huggingface_hub 0.36.2: 114 passed
• huggingface_hub 1.32.0: 114 passed, 1 warning. The warning was there before this change:
  test_model_loading.py passes proxies=, which huggingface_hub 1.x ignores.

MLX backend at the new floor (0.30.0, mlx 0.32.2): python -m pytest src/timesfm3/mlx -q →
20 passed, 14 skipped. The skipped tests require a cached TimesFM 3.0 checkpoint.

Install behaviour: I built wheels with python -m build and ran pip install "<wheel>[torch]"
into an environment that already had huggingface_hub 0.29.3.

• Before: the wheel declares Requires-Dist: huggingface_hub>=0.28.0. pip leaves
  huggingface_hub at 0.29.3, and import timesfm raises the paper_url TypeError.
• After: the wheel declares Requires-Dist: huggingface_hub>=0.30.0. pip upgrades
  huggingface_hub, and import timesfm succeeds.

proxies failure from #412, checked against current master: I put the real config.json
from google/timesfm-2.5-200m-pytorch next to randomly initialised weights and called
TimesFM_2p5_200M_torch.from_pretrained(path) with no extra arguments.

• huggingface_hub 0.30.0 and 0.36.2: the commit before Fix model loading issues and forecast_naive slicing bug in TimesFM 2.5 #435 raises
  TypeError: TimesFM_2p5_200M_torch.__init__() got an unexpected keyword argument 'proxies'.
  Master loads and picks up torch_compile: false from the config.
• huggingface_hub 1.32.0: both load.

Environment: macOS arm64, Python 3.11, torch 2.14.0, jax 0.10.2, flax 0.12.8.

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