Add relic_menumanager helper library

[relic-se]

Library is functionally complete with adequate examples but documentation is somewhat lacking. 🤷

[tannewt]

Thank you!

[tannewt]

(looks like you need to do a release)

[relic-se]

(looks like you need to do a release)

@tannewt Odd. I have a release ready (https://github.com/relic-se/CircuitPython_MenuManager/releases/tag/1.0.0) but it's possible that during my attempts to make PyPI happy by re-releasing it after minor changes, it may have confused this Build CI. Would you be able to run the actions again?

[FoamyGuy]

@relic-se I re-ran it. I think it's failing now because the submodule change in this PR points at commit relic-se/CircuitPython_MenuManager@0049b4f but the release 1.0.0 is targeting a different commit: relic-se/CircuitPython_MenuManager@58aa658.

The one in the PR needs to have a release tagged against it. So either new release against 0049b4... or update the PR to target 58aa658...

[relic-se]

@FoamyGuy That makes sense. Thank you for identifying the issue!! Should be ready now.