Make it possible to resume LSDB pipeline

[hombit]

Feature request

Let's say I'm running a pipeline, but the job crashes. It would be nice to resume and continue from the same point!

One option would be to add a Catalog.to_hats(..., resume: bool = False) argument which, if set to True, would check the target folder and skip all partitions that are already present. It should probably also verify the validity of existing Parquet files.

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Please check the following:

• I have described the purpose of the suggested change, specifying what I need the enhancement to accomplish, i.e. what problem it solves.
• I have included any relevant links, screenshots, environment information, and data relevant to implementing the requested feature, as well as pseudocode for how I want to access the new functionality.
• If I have ideas for how the new feature could be implemented, I have provided explanations and/or pseudocode and/or task lists for the steps.

[hombit]

Related to #759