Any program which wants to use json file to update/extend the
chaton's configurable template data, can include this new file
chaton_json.hpp, to get the reqd functionality.
Update chaton_meta_ok, _chaton_meta_validate_dump and
chaton_meta_load_json to either work with a passed ChatTemplates
instance, or fallback to the compiled-in global instance of same.
HanishKVC