[SEDONA-708] Separate Catalog implementation into AbstractCatalog and Catalog #1798
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Is this PR related to a JIRA ticket?
[SEDONA-XXX] my subject.What changes were proposed in this PR?
This separates out the Catalog class into an Abstract class that holds logic and the Catalog class that holds function definitions. This allows Sedona users to build their own Catalogs with custom ST functions.
How was this patch tested?
Existing unit tests provide coverage
Did this PR include necessary documentation updates?
Generally we are not documenting these semi-internal APIs. I can add docstrings if we want