Support dev mode installations with path rewrite.

[gregglind]

After reading pfmoore/editables#20, I think editable fixed the issue (2023) after this patch to Hatch was written.

As a very lazy programmer who favors monorepos and shared namespaces, I love that path rewrite allows me to skip making a bunch of empty nested folders, and I hope to use it more!

Code is here:

hatch/backend/src/hatchling/builders/wheel.py

Line 535 in d81790e

'https://github.com/pfmoore/editables/issues/20'