Caret floating menu

[streamich]

• [ ] Open on "second caret click", when mouse click in existing caret position.
• [ ] Remove all other floating menus:
  • [ ] Selection menu.
  • [ ] Block menu.
• [ ] Keyboard shortcut to open caret floating menu.
• [ ] Close on Esc.
• [ ] Ability pick inline formatting.
• [ ] Ability to select formatting overlapping with caret.
• [ ] Ability to render custom content next to caret.
  • [ ] Above
  • [ ] Below
  • [ ] Left/right
• [ ] Ability to render custom content inside caret floating menu.
  • [ ] Before other content
  • [ ] After other content
  • [ ] Integrate with the MenuItem declarative system?