Lexical based editor todo

In progress

Alignments: Use existing classes for blocks (including table cells)
Alignments: Handle inline block content (image, video)
Image paste upload
Keyboard shortcuts support
Add ID support to all block types
Link popup menu for cross-content reference
Link heading-based ID reference menu
Image gallery integration for insert
Image gallery integration for form
Drawing gallery integration
Support media src conversions (https://github.com/tinymce/tinymce/blob/release/6.6/modules/tinymce/src/plugins/media/main/ts/core/UrlPatterns.ts)
Media resize support (like images)
Table caption text support
Table Cut/Copy/Paste column

Image resizing currently bugged, maybe change to ghost resizer in decorator instead of updating core node.
Removing link around image via button deletes image, not just link
SELECTION_CHANGE_COMMAND not fired when clicking out of a table cell. Prevents toolbar hiding on table unselect.
Template drag/drop not handled when outside core editor area (ignored in margin area).
Table row copy/paste does not handle merged cells
- TinyMCE fills gaps with the cells that would be visually in the row