feat[python]: support full read/write from object storage

[a10y]

This adds the ability to write in PyVortex directly to object storage, along with more ergonomic configuration of object store credentials for the major PyVortex read/write paths: vx.open, vx.io.read, and vx.io.write.

This is using the https://docs.rs/pyo3-object_store/latest/pyo3_object_store/ crate, which is what runs the obstore Python library.

Notably, we can't reuse obstore and all of its types directly. This is b/c of the way it works, you're required to actually link in pyo3-object_store and then expose it as a new module within your Python bundle.

There are some other examples of this pattern:

• nutpie
• geoarrow

Sadly there's no nicely distributed types package, so I need to copy all of the pyi files here with their original MIT license.

I've added a Python unit test to demonstrate using the new object store builders with simple local file system object store

Resolves #5673

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 82.93%. Comparing base (12ba988) to head (cc7a06b).
⚠️ Report is 11 commits behind head on develop.

Files with missing lines	Patch %	Lines
vortex-io/src/write.rs	0.00%	1 Missing ⚠️

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