Docstrings update

[Abeansits]

As requested in CONTRIBUTING.md I've added some missing doc strings.
Can't confirm they are 100% correct since I don't have an invite yet. ;)

Doc strings added to:

• agent.py
• action.py
• computer.py

[psarka]

Sweet, thank you! ❤️

I left some comments if you don't mind :)

[Abeansits]

@psarka thanks for the feedback, got them resolved

[psarka]

Awesome! Can you run uv run pre-commit run --all-files, ruff format is complaining :)

[Abeansits]

you got it @psarka

would be nice with some CI checks here at some point :)

[psarka]

There is a CI check, but I need to approve for it to run. I think it's because it's your first contribution:

https://docs.github.com/en/actions/managing-workflow-runs-and-deployments/managing-workflow-runs/approving-workflow-runs-from-public-forks

By default, all first-time contributors require approval to run workflows.

Anyways, everything is green now 🥳