* single mapblock loading/saving with zip format
* fix typos
* serialize_multi wip
* remove submodule, add hard-dep
* add version
* zip suffix in examples
* skip air-only blocks
* indent fix
* add integration test
* multi wip
* refactor commands/functions to multi mapblock support only
* catalog api stub
* catalog deserialize wip
* working save/load
* working tests
* ugh
* partially fix ldoc
* docs
* refactoring
* fix metrics
* indent fix
* throw out local caching, replaced by Catalog:prepare
* add legacy `mapblock_lib.deserialize()`
Co-authored-by: BuckarooBanzay <BuckarooBanzay@users.noreply.github.com>
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