Review collaboration guidelines.

[AlexTheWizardL]

After implementing previous tasks from the milestone we`ll maintain the code style guideline that should be described in the collaboration document.

Contributing file is stored under the cashctrl_api repo. This file is linked in the [Package Development and Contribution](Package Development and Contribution) section in the cashctrl_ledger repo.

This file should be updated with following sections:

• Code style rules
• Common security rules
• Coherence in the code base and docstrings rules
• Navigation in large class definitions rules
• ...

[lasuk]

I found below advise by @AlexTheWizardL for working with ChatGPT very helpful. I suggest to add it to the next version of the collaboration guidelines:

Save these rules and apply to every code you type for me:

[flake8]
max-line-length = 100
ignore = D100,D101,D102,D103,D104,D105,D107,D202,D203,D204,D205,D400,D401,D402,D403,D404,D405,D406,D407,D408,D409,D410,D411,D412,D413,D414,E203,W503
import-order-style = google
docstring-convention = google
exclude = .git,__pycache__,.pytest_cache,*.egg-info