Add tabout of paired brackets

[eugenesvk]

There is already a great description of this feature that I miss in Helix in this discussion, excerpted below, so I'm just following the suggestion of creating a feature request based on that

Tabout actually takes you out of '' or "" or () ... in insert mode. For
example if you want to write print("something"); then in simpler steps:

• First you write print
• Then you write ( which get auto-paired to ()
• Now your current state is print(|)(| represents cursor position)
• You write ": print("|")(| represents cursor position)
• Now you type something: print("something|")(| represents cursor position)
• Notice that you are in insert mode, at the end of something and you have to
  move beyond "). Here you can either get into normal mode, go to the end, get
  in insert mode and type ; to complete the task or you can type ") which will take you to the end so you can type ; to complete the task.
• Instead of the two ways given above you can just press tab twice at
  print("something|")(| represents cursor position) to move to the end
  print("something")|, still in insert mode to type ; and complete the task.

[xcpky]

I have the same need.

[kirawi]

This was implemented by #4443