Build/CI: modernize build/doc/ci

[mrava87]

This PR mimics PyLops/pyproximal#241 for the PyLops repository:

• update pyproject.toml - MUST MAKE TORCH/JAX MORE FLEXIBLE (CPU/GPU)
• add uv.lock*
• add targets in Makefile
• add build action in GA
• update readthedocs

• Currently created with the following set of commands:

uv venv --python 3.13
uv lock
uv sync --locked --all-extras --all-groups 

!! CURRENTLY WITH UV A TEST IN TEST_RADON CRASHES !!

It also modernizes the overall tooling:

• move content of setup.cfg to pyproject.toml
• switch from black/flake8/isort to ruff
• add coverage support with upload to codacy (like pylops)

Finally, it contains various improvements to the documentation:

• add installation instructions for uv
• use sphinx-design to have tabs in installation instructions for conda/pip/uv
• added emojii in main section titles