Simplify package publication using uv

[robbibt]

Proposed changes

This PR updates and simplifies our Python package build and publish process to use uv. This lets us go from:

python3 -m pip install setuptools_scm build
python3 -m setuptools_scm
cd Tools
python3 -m pip install pip==22.0.4
python3 -m pip install --use-feature=in-tree-build --no-deps .
python3 -c "import dea_tools; print(dea_tools.__version__)"
python3 -m build

To:

uv sync
uv build
uv publish

You can see an example of the newly built package here: https://pypi.org/project/dea-tools/#history