Skeleton service incorporation into CAVEclient is working, at least in certain respects

[kebwi]

I'd like to merge these CAVEclient changes in but would definitely appreciate others looking it all over to make sure it doesn't look like it would break anything important.

[ceesem]

A few comments:

1. We should have basic tests to be included before it's merged to avoid simple breaking errors.
2. While it's not consistent with the older code, it would be nice if new code were type hinted as we work on an overhaul to "modern" stylings (same with the version locking system)

[ceesem]

Looking at the endpoints that are available, I wonder if it wouldn't make sense to add something like:

1. skeleton_exists(self, root_ids, version=None, ...) : This would take a list of root ids and tell you which all have existing skeletons, which could be useful for organizing bulk analysis and debugging.
2. skeletonization_versions(self, datastack_name=None) : This would return a list of keys for the versions that are available and descriptions of each version, including maybe links to the exact code.

I also wonder if there shouldn't be a multithreaded bulk download function.

[ceesem]

Also note that there are currently are some linting errors.

[kebwi]

Looking at the endpoints that are available, I wonder if it wouldn't make sense to add something like:

1. skeleton_exists(self, root_ids, version=None, ...) : This would take a list of root ids and tell you which all have existing skeletons, which could be useful for organizing bulk analysis and debugging.
2. skeletonization_versions(self, datastack_name=None) : This would return a list of keys for the versions that are available and descriptions of each version, including maybe links to the exact code.

I also wonder if there shouldn't be a multithreaded bulk download function.

Saving for another day. I'd like to wrap up this PR for now.

[kebwi]

I object to the lint tests requiring ruff formatting that butchers the code and requires us to work with a visual morass instead of formatting code in a way that is easier to visually comprehend and understand.