Small updates to wkf tools

[kirstybayliss]

This PR implements the following small updates to the wkf:

• adds a tool to check a toml file contains all necessary details, make a working copy, and set zones to use from a list
• updates set_defaults so that defaults can be added only for a list of specified zones
• set_gr_params now checks lists properly
• adding new plotting options for focal mechanism data (this should maybe be in a different location?)
• create_subcatalogues takes a given list of sources and passes on all catalogue info
• analysis_nodal_plane now passes on the option to save an output csv with a classification column
• added the option to only pass selected zones (by id) to wkf functions
• mfd check now works with multimfd of truncGutenbergRichterMFD type
• updates h3_polyfill to use 'geojson_compliant' parameter, meaning we don't need to switch the lat/lon columns
• updates the ghm file to get new ocean island site locations
• adds code for sanity-checking source xmls (combined from various notebooks)