Use uv_build for our build backend step

[tbille]

Update build step to use uv build backend: https://docs.astral.sh/uv/concepts/build-backend/

Currently dynamic versioning is not supported. To use this backend we'll have to find a workaround and revisit the way versions are bumped.

[peteski22]

https://pypi.org/project/uv-dynamic-versioning/