chore: Package py.typed files with the built distribution

[msto]

Summary

Third time's the charm. 😅

The py.typed files were missing from the built distribution because the pyproject.toml was configured to include only .py source files. I've updated the configuration to also include py.typed, so these files will now be part of the distribution and available in pypi installs.

Thank you for the patience and thanks for including this!

Changed

• Updated pyproject.toml so py.typed files in the src/ package directories are included in the built distribution.

Notes

I confirmed that the tarball built with uv build includes the py.typed files after this change to the pyproject.toml, and that no other files are added or removed.

$ tar -t -f dist/latch-2.61.1.tar.gz | grep py.typed
latch-2.61.1/src/latch/py.typed
latch-2.61.1/src/latch_cli/py.typed
latch-2.61.1/src/latch_sdk_config/py.typed
latch-2.61.1/src/latch_sdk_gql/py.typed

$ uv build && tar -t -f dist/latch-2.61.1.tar.gz > old_build.txt
$ <modify pyproject.toml>
$ uv build && tar -t -f dist/latch-2.61.1.tar.gz > new_build.txt

$ diff old_build.txt new_build.txt
3a4
> latch-2.61.1/src/latch/py.typed
70a72
> latch-2.61.1/src/latch_cli/py.typed
173a176
> latch-2.61.1/src/latch_sdk_config/py.typed
176a180
> latch-2.61.1/src/latch_sdk_gql/py.typed

new_build.txt
old_build.txt

[msto]

Related to #541 and #517