Fixes https://github.com/microsoft/vscode/issues/81712 and https://github.com/microsoft/vscode/issues/81736

These features are not working in many cases and the api around them will likely change significantly

It needs more polishing and should probably only be enabled for files that may have custom editors enabled

Fixes #80617

Some extensions may provide us with bad data types (if they are js or don't have strict null enabled for example). Try to be more careful about handling such cases by falling back to an empty array instead of undefined

Fixes #80777

- Fix keyboard shortcut to show context menu
- Fix showing gear icon when settings row is focused

Remove focus outline on settings editor. It's not tabbable so it doesn't serve any purpose and is annoying to see every time I click on the editor background. Just need to keep .editor-instance from getting focus on click.
Fix #81675

Fixes #81685

#81131

Discovered as part of #81574

A readOnly editor doesn't honor readonly in the textArea