Python 3.14 support

Hi there, can't install markitdown-mcp with pipx install markitdown-mcp in Fedora 43 with Python 3.14. The error is:

The conflict is caused by:
    magika 0.6.3 depends on onnxruntime>=1.17.0; python_full_version >= "3.10"
    magika 0.6.2 depends on onnxruntime>=1.17.0; python_full_version >= "3.10"
    magika 0.6.1 depends on onnxruntime>=1.17.0; python_full_version >= "3.10"

Additionally, some packages in these conflicts have no matching distributions available for your environment:
    onnxruntime

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip to attempt to solve the dependency conflict


PIP STDERR
----------
ERROR: Cannot install markitdown because these package versions have conflicting dependencies.
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/topics/dependency-resolution/#dealing-with-dependency-conflicts

This error seems to be caused by onnxruntime not supporting 3.14 yet. Here is the microsoft/onnxruntime#26309. Hopefully this can be resolved soon.
Thanks.

Start by reproducing pipx install markitdown-mcp with Python 3.14 on Fedora 43 and review the reported onnxruntime compatibility limitation in microsoft/onnxruntime#26309. Determine whether this repository has a dependency or supported-Python declaration that needs updating. Done means the package can be installed under Python 3.14 without the reported resolution failure.