Feature Request: Prompt for Group Name

[ccampanale]

First off, thank you for this extremely helpful extension!

I'd like to submit a feature request (and if I have time, a PR):

Users should be able to toggle an extension setting which would cause the extension to prompt the user for the desired name of the group being minimized using VS Code's built-in prompt capabilities. The setting would likely be a simply boolean toggle to enable/disable the prompt. If enabled but an empty string is provided, the default name (current behavior) would be used. If disabled, the extension would behave as it does today. The setting would be disabled by default pending a future major release.

Please let me know if you have any thoughts or questions.