Renamed PRIMARY_HOSTNAME to BOX_HOSTNAME

[tognee]

While I was working on the new domain management I found that the use of primary while talking about hostname or domains was getting a bit too confusing, so I decided to rename all things related to "primary" to something that makes more sense given the context around the code.

This is a big change in the codebase and I don't want it to be merged together with the new domains system, so I'm making a pull request just for this.

I've also added ruff files for linting and a dev-requirements.txt file with the python requirements found in setup/management.sh so that devs can create a virtualenv, install from the file and have type hints when using editors like vscode.

[JoshData]

I really can't foresee ever taking the time to review this.

[tognee]

Is there anyone else on the project that could take time to review it?

[yodax]

This is too large for too little gain. A cursory glance also shows python renames and not just the global var. This feels like a change that is high risk for just a rename. Also I’m familiar with the old name. So there would be some relearning when reviewing future PRs

[tognee]

I completely understand that this is a big change, but making the structure more manageable and making the variable names have a meaning is really important to help new developers familiarize with the project and understand how it works.

I don't think I'm able to work on the new feature without doing some refactoring, as the next PR would have had a split and refactor of the management/mailconfig.py file. That would've been a big change too, so maybe it's better for me to drop this.
I don't think I can make a good implementation of my idea without changing too much code.

[JoshData]

I don't think I can make a good implementation of my idea without changing too much code.

This project is in a phase where high-risk changes are extremely difficult to get past the finish line. The folks who worked on the quota PR have been incredibly patient in waiting years to get through review.