Improve GeoDjango type-hints

[ciscorn]

I have made things!

• Provide more specific type-hints for GeoDjango modules.
• Fixed some missing exports in contrib/gis/**/__init__.py
• Removed unintentional re-exports in many modules.

Related issues

No

[sobolevn]

Oh wow! Thanks a lot! This is amazing!

But, I literally have 0 experience with gis.
Maybe @intgr or @adamchainz have more knowledge?

[intgr]

Nope, I have no experience with Django GIS.

[intgr]

Looks good on a cursory read. As noted above, the TypedDjango team doesn't use GeoDjango. I'm inclined to just merge this as is, it's filling out types that used to be just Any.

Changes like this are rarely perfect and we shouldn't expect them to be. If it causes regressions for users, they will be reported and can be improved.

[intgr]

There was some overlap between this PR and #1265 (which just got merged to master).

I have pushed a merge with the latest master.

[intgr]

After looking into this some more, there are lots of re-exports that look like they shouldn't be re-exports.

Usually Django only has re-exports in __init__.py files. Also items in explicit module __all__ = [...] should be re-exported. The remaining typically should not be.

[intgr]

PS: I don't expect you to fix all the pre-existing incorrect re-exports. Just fix the new ones you have added in this PR.

[intgr]

Thanks! Waiting for the CI to finish.

[intgr]

Maybe @mjakob can try this out and share some feedback.