Make it easier to make sky plots

Feature request

Some plotting functionality is available only through hats.inspection.plot_*(lsdb_catalog.hc_structure). It would be nice to make this functionality accessible directly from LSDB. Relevant documentation page would be very helpful.

• plot_density for unchanged catalog
• plot_healpix_map for Catalog.skymap_histogram output

Before submitting 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.