Generate nanobind type stubs

[inducer]

This is an attempt to make use of nanobind's stub generation

This does not work at all for now. Problems:

• [ ] How do we convince scikit-build-core to install py.typed?
• [ ] nanobind.stubgen produces a bunch of lines with @property that decorate nothing.
• [ ] Can editable installs work?
• [ ] nanobind.stubgen fails during build while trying to import pytools (because it's apparently trying to import pyopencl)