* Add a spec draft for Keybindings Arguments.
Specs #1142.
Just read the spec :)
* Apply suggestions from code review
Co-Authored-By: Carlos Zamora <carlos.zamora@microsoft.com>
* Include notes on reliability, security, and `Handle`ing Keybinding Args
* Add some extra details from review
* Split up ActionArgs and ActionEventArgs
* Clarify _not_ handling an action
* Add some notes on parsing args
* Add some future considerations on extensions
* Updating spec to remove the bulk of the `IActionArgs` and `IActionEventArgs` implementations, as they're redundant.