"Passing Key" - Allow users to Temporarily disable vimMode for one Keystroke

[Brynnjolf]

Is your feature request related to a problem? Please describe.
It is difficult to leverage the power of both VsCode and the vim motions, because vim obviously overrides many useful keyboard shortcuts and vice-versa.

Describe the solution you'd like
A solution that I find very very nice is used in Qt Creator. While in vim mode, specifically NORMAL mode, a user can press the comma key (,) to enter "passing" mode. This mode allows the user to input ONE keyboard shortcut that will bypass vim and be handled by the IDE. Afterwards, it will automatically switch back to NORMAL mode.

Describe alternatives you've considered
The classic Alternative is to simply map "Toggle vim mode". I have found passing mode to be far more "fluid" and incredibly useful. It really does bridge the contextual gap between vim and the IDE.