* Fix gamma correction with HTML-based editable Text tool text
* Migrate simple, undecorated classes to types
* Remove TupleToVec2 transformation
* Remove @Transform from tooltips
* Cleanup: replace value.toString() with String(value) everywhere
* Convert documentId from string to bigint
* Migrate the rest of the easy @Transform/@Type decorations
* Migrate FillChoice
* Migrate WidgetDiffUpdate
* Migrate WidgetInstance
* Migrate away from classes that extend WidgetProps
* Remove class-transformer and all classes in messages.ts
* Migrate UI layout passing
* Remove dead code
* Remove unnecessary export and readonly prefixes
* Remove HSVA type
* Break out Color, Gradient, and FillChoice functions into a utility-functions file
* Move widget helper functions from messages.ts into a new utility-functions file; restructure type imports
* Reduce internal type defs
* Rename JsMessage to FrontendMessage
* Code review fixes
* Fix other usages
* Tidying up
