:package: Exclude tests from source distribution and binary wheel

[weiji14]

Keeping things lightweight by reducing the sdist size from 17.7kB to 14.0kB, and also the bdist wheel package from about 25.0kB to 18.2kB. There are still doctests in the source code though!

Building zen3geo (0.4.1.dev2)
  - Building sdist
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/__init__.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/__init__.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/datashader.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/geopandas.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/pyogrio.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/pystac.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/rioxarray.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/xbatcher.py
  - Adding: LICENSE.md
  - Adding: README.md
  - Adding: pyproject.toml
  - Built zen3geo-0.4.1.dev2.tar.gz
  - Building wheel
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/__init__.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/__init__.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/datashader.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/geopandas.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/pyogrio.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/pystac.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/rioxarray.py
  - Adding: /home/runner/work/zen3geo/zen3geo/zen3geo/datapipes/xbatcher.py
Skipping: /home/runner/work/zen3geo/zen3geo/LICENSE
Skipping: /home/runner/work/zen3geo/zen3geo/COPYING
  - Built zen3geo-0.4.1.dev2-py3-none-any.whl

Generated files:
total 36K
-rw-r--r-- 1 runner docker 18K Sep 11 16:02 zen3geo-0.4.1.dev2-py3-none-any.whl
-rw-r--r-- 1 runner docker 14K Sep 11 16:02 zen3geo-0.4.1.dev2.tar.gz

Compare file sizes of zen3geo v0.4.1.dev1 at https://test.pypi.org/project/zen3geo/0.4.1.dev1/#files and v0.4.2.dev2 at https://test.pypi.org/project/zen3geo/0.4.1.dev2/#files

References:

• https://python-poetry.org/docs/pyproject/#include-and-exclude
• https://discuss.python.org/t/should-sdists-include-docs-and-tests/14578