Update project tooling and structure

[BielStela]

Move project structure to be src/ and pyproject.toml based. Also introduces ruff and mypy as basic tooling and checks with pre-commit hooks.

This is a major refactor and it will change the layout quite a lot so feel free to turn down any of the included changes.

Also adds support to python 3.12

[BielStela]

There is a single test failing test_chunk_execute failing from dask version 2023.9.2 up. The last release was done with an older version prior to 2023.9.2 and so it worked well. Anything beyond 2023.9.2 will cause this test to fail.

I can't see anything suspicious in the changelogs