[ui] New keyboard shortcut for Create Variable

[philrenaud]

Now, from a variable page, you can type in n v, which stands for "NeVermind why I chose those letters"

[github-actions]

Ember Test Audit comparison

	main	715764b	change
passes	1498	1498	0
failures	1	1	0
flaky	0	0	0
duration	000ms	000ms	-000ms

[mikenomitch]

+1 - I like "n _" for "new ____" actions generally. For anything else we have create actions for. Policies, Jobs, Roles, Tokens?