docs: add Google-style docs to diracx-cli and remove D100-D300 from per-file-ignores for it

[martynia]

This is a docstring fix PR for diracx-cli directory using a branched-off code from #1008.

The following changes and a verification procedure was performed:

1. modify pyproject.toml by removing "ignores" from the relevant line: "diracx-cli/src/diracx/cli/**/*.py" = []
2. verify failures: pixi run -e pre-commit pre-commit run ruff-check --files $(find diracx-cli -name '*.py')
3. add google-style docstring to files in the directory in question one by one
4. verify that ruff passes for a file fixed: i.e. pixi run -e pre-commit pre-commit run ruff-check --files $(find diracx-cli -name 'utils.py')
5. when finished with all files verify that all files pass:pixi run -e pre-commit pre-commit run ruff-check --files $(find diracx-cli -name '*.py')