Support free-threaded python

[abhiaagarwal]

Description

Use Case

I was playing around with freethreaded python and realized delta would be a great usecase for it, given the table's state is protected by an Arc in python-land and could operate without the GIL. With arro3 now supporting freethreaded python in the latest release, it should be relatively easy.

Related Issue(s)

[ion-elgreco]

We need to have separate release pipeline for 3.14+ wheels, just some context for other people who wish to pick this up.

https://pyo3.rs/v0.27.1/free-threading.html#cannot-build-extensions-using-the-limited-api

Cannot build extensions using the limited API
The free-threaded build uses a completely new ABI and there is not yet an equivalent to the limited API for the free-threaded ABI. That means if your crate depends on PyO3 using the abi3 feature or an an abi3-pyxx feature, PyO3 will print a warning and ignore that setting when building extensions using the free-threaded interpreter.

This means that if your package makes use of the ABI forward compatibility provided by the limited API to upload only one wheel for each release of your package, you will need to update your release procedure to also upload a version-specific free-threaded wheel.

See the guide section for more details about supporting multiple different Python versions, including the free-threaded build.