* fix: blur in io, remove panzoom and use fabricjs for panzoom
- remove panzoom
- implement panzoom using fabricjs
- set background image for canvas
- add bounding rect for canvas
- draw or add point inside in bounding rect
- update zoom tool
* support pinch to zoom on mobile client
* fix lagging of canvas, zoom in draw mode
* panning in touch events
* Simplify handling of occlusion types in editor code
- Unify updateIONoteInEditMode(), setOcclusionFieldInner() and
setOcclusionField() into updateOcclusionsField()
- Don't use `includeInactive` property of Shape class in editor code
- Drop `isEditMode`
+
Update the occlusions field every time a mask or text is updated, not
only in editing mode but also in adding mode, so that IO cards can be
previewed correctly in the card layout screen
* Indicate current occlusion type in pop-up menu
https://forums.ankiweb.net/t/anki-23-10-beta-5-6/35677/46
* Fix a11y warnings in Toolbar.svelte
* Drop `occludeInactive` parameter from `MaskEditorAPI.getShapes()`
* Add simple mask editor add-on API
* Signal completed mask editor image loading to Python
* Add API methods for querying mask editor state, fix formatting
* Use event forwarding to propagate image loaded event
Should fix mobile support by moving all bridgeCommand calls to `NoteEditor.svelte`
* Add shape classes to mask editor API
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Co-authored-by: Glutanimate <glutanimate@users.noreply.github.com>
