chore: Point the docs and workflows at the nibiru project rather than nibiru-py

[Unique-Divine]

No description provided.

[matthiasmatt]

You mean the https://nibiru-py.readthedocs.io/en/latest/ url? We need to create a new readthedoc for this, i looked and apart from contacting support there's no way to rename the nibiru-py stuff.

[Unique-Divine]

That's probably fine as long as we remove references to pip install nibiru-py and replace them with pip install nibiru.