Add a guide for publishing packages

[zanieb]

Closes #5793

[zanieb]

Not a ton to say here, can we include more content?

[stanmart]

build can use uv for creating the build environment. The docs for building the package could make use of this. It's much faster, and imo also conceptually nicer than relying on pip for this step only. The downside is that the build command becomes a bit more complex:

uvx --from build pyproject-build --installer uv

[zanieb]

Oh cool, thank you!

[zanieb]

#5854