docs: update README with latest changes

[Molkree]

Fixes:

• Add documentation #32

@valentina-s, do you think just the link to the GitHub Actions introduction is enough or I should explain more here?

I have put short descriptions of each script/workflow in the main README and not in subfolder for each one because I have encountered some issues with imports (of spectrogram functions) when I moved them into separate folders (ooi/orcasound). I think it is due to the fact that they are not proper Python packages right now. Let's leave it like this for now because after converting them into proper Actions this won't be a problem (as they will be in separate repositories, each with their own util functions).

[valentina-s]

@Molkree

Fixes:

• Add documentation #32

@valentina-s, do you think just the link to the GitHub Actions introduction is enough or I should explain more here?

You can add a couple of more sentences about the context: we are accessing different datastreams, we can schedule and run jobs for free, etc.

I have put short descriptions of each script/workflow in the main README and not in subfolder for each one because I have encountered some issues with imports (of spectrogram functions) when I moved them into separate folders (ooi/orcasound). I think it is due to the fact that they are not proper Python packages right now. Let's leave it like this for now because after converting them into proper Actions this won't be a problem (as they will be in separate repositories, each with their own util functions).

Maybe __init__.py files would have helped? It is ok this way, since it is not too many functions.