[FEATURE] Add shortcuts to the bar

[haaarshsingh]

Description

Add a built in way to handle shortcuts with the bar. In several bars, there are single-key shortcuts that users can press to use certain commands.

Currently, there's only the useShortcut hooks which developers can use to manually add commands, which isn't ALWAYS practical.

Suggested Fix

Add a field to the Command type called shortcuts of type Array<string>, and inside of it type shortcuts for the function which the user can use for the application.