Import actions from package.json scripts

[buzinas]

What

Add the ability to import actions from package.json scripts.

Why

Right now, adding actions one by one is a bit tedious.

How

1. On the actions dropdown, add a new item "Import from package.json scripts".
2. Once you click it, a dialog opens up displaying a list with all package.json scripts:
   2.1. A checkbox to select which scripts you'd like to import.
   2.2. Script command ("${packageManager} run ${script}").
   2.3. Script name
   2.4. Keybinding
   2.5. "Run automatically on worktree creation" toggle