[Accessibility]: Make Escape key work to go back to editing cursor position from Quarto assist view

Explorer: Focus on Quarto View allows screen reader users to accessibly jump and review Quarto assist view.

I have assigned the following keybinding

[
  {
    "key": "ctrl+f1",
    "command": "quarto-assist.focus",
    "when": "editorTextFocus"
  }
]

This works nicely in *.qmd file and I can press Ctrl+F1 on any R/Python command to review real-time Quarto assist view.

The current problem is that I cannot leave this Quarto assist view with ESC key to retain my original editing cursor position. My workaround is pressing Ctrl+1 to explicitly focus in my editor 1 area.

It would be nicer if we could make this work.

Start by tracing the quarto-assist.focus command and the Quarto assist view behavior. Check how focus is transferred from the editor and how Escape is handled; done means Escape returns focus to the original editing cursor position in a .qmd file after the assist view is focused.