* fix: remove some attributes from the JSO system
Remove the deletable, movable, and editable attributes.
Normally this would be a breaking change, but because this isn't
released yet it's just a patch.
* fixup: serializer tests
* Respect nulls from blocks.save
* Upgrade list blocks to use JSO serialization
* Upgrade logic blocks to use JSO serialization
* Upgrade math blocks to use JSO serialization
* Upgrade text blocks to use JSO serialization
* Upgrade procedure blocks to use JSO serialization
* Add more mutator tests
* Fix firing enabled events
* PR Comments
* Upgrade field angle to use new serialization
* Upgrade field checkbox to use new serialization
* Upgrade field colour to use new serialization
* Upgrade field dropdown to use new serialization
* Upgrade serializable label field to use new serialization
* Upgrade field multiline input to use new serialization
* Upgrade field number to use new serialization
* Upgrade field text input to use new serialization
* Upgrade variable field to use new serialization
* Fix type casts
* Feedback from PR
* Switch to use getValue()
* Setup basic architecture for tests
* Attribute tests
* Easy field tests added
* Work on tests
* Work on tests
* Work on tests
* Add mutation tests
* Fixup ID tests
* Add more mutator tests
* Fixup lint and typos
* Uncomment tests
* Use test helpers
* Small PR comments
* Use test helpers for setup and teardown
* Add TODOs and fixup types
* Fix types
* Actually fix types
