Description of the bug

Our project uses Pydantic v1 and our docs stopped building after mkdocstrings-python 1.14.0 was released. It seems that importing mkdocstrings_handlers.python doesn't work if Pydantic v1 is installed.

To Reproduce

> pip install "pydantic<2.0.0" mkdocstrings-python==1.14.1
> python -c "import mkdocstrings_handlers.python"

Full traceback

Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import mkdocstrings_handlers.python
  File "/tmp/venv/lib64/python3.13/site-packages/mkdocstrings_handlers/python/__init__.py", line 3, in <module>
    from mkdocstrings_handlers.python.handler import get_handler
  File "/tmp/venv/lib64/python3.13/site-packages/mkdocstrings_handlers/python/handler.py", line 30, in <module>
    from mkdocstrings_handlers.python.config import PythonConfig, PythonOptions
  File "/tmp/venv/lib64/python3.13/site-packages/mkdocstrings_handlers/python/config.py", line 71, in <module>
    @dataclass(**_dataclass_options)  # type: ignore[call-overload]
     ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
  File "pydantic/dataclasses.py", line 231, in pydantic.dataclasses.dataclass.wrap
  File "pydantic/dataclasses.py", line 354, in pydantic.dataclasses._add_pydantic_validation_attributes
  File "pydantic/dataclasses.py", line 407, in pydantic.dataclasses.create_pydantic_model_from_dataclass
  File "pydantic/main.py", line 1030, in pydantic.main.create_model
  File "pydantic/main.py", line 197, in pydantic.main.ModelMetaclass.__new__
  File "pydantic/fields.py", line 495, in pydantic.fields.ModelField.infer
  File "pydantic/fields.py", line 474, in pydantic.fields.ModelField._get_field_info
ValueError: cannot specify `Annotated` and value `Field`s together for 'ignore_init_summary'

Expected behavior

It would be great if mkdocstrings-python could support Pydantic v1 or at least ignore it, since the Pydantic dependency seems to be optional anyway.