Establish Python development guidelines

[mbarlow12]

Taken from a suggestion in https://github.com/RMI/opgee-highlander/pull/24. It could be beneficial to establish a broad set of guidelines to inform the python development process. The same could be done for other languages or project types.

Where
Propose adding new guidelines or docs folder.
Language specific docs can reside in relevant sub-folder: docs/python or guidelines/python

Contents

• style guidelines
• common/recommended tooling
• architectural/design guidance
• recommended packages for various needs (e.g. "data manipulation" -> polars, db connectivity -> psycopg3 or asyncpg, etc...)
• testing protocols and tooling
• packaging, releasing, publishing
• unique SDLC elements that are specific to python projects

[samhuestis]

Think this is a great idea as well and could be helpful for closer integration of SPD and non-SPD RMI software work in the future.