Optimade widgets decouple from client repo

[unkcpz]

Desired Outcome

The aiidalab-widget-base will not depend on the optimade-client which is maintained and release controlled in https://github.com/CasperWA/voila-optimade-client.
Instead, create a new repository ipyoptimade, and move widgets to the repo.

Impact

Gaining more control of the release and feature implementation of the optimade widgets.

Task log

• 2024-01-16: DH: would be better to make optimade widget an optional of AWB (Make optimade dependency optional aiidalab-widgets-base#547).
• 2024-01-19: GP: the periodic table should have same UX as the one from MC3D
• 2024-02-01: Migrate optimade-client to use ipyoptimade, adding useful Devops and delete unused dependbot.
• 2024-02-20: some attempt to use anywidget for the periodic table, and it works!! 🚀 Fea/anywidget periodic table ipyoptimade#18, need more ironing on the JS code (I am quite new with JS and TS) or directly using react implementation from Kristjan.
• 2024-02-29: The optimade is an extra dependency of AWB, and we are about to make the new AWB release (v2.2.0).