unify tor installation per platform

Problem to solve

• What feature(s) affected?
• What docs or doc section affected? Include links or paths.
• Is there a problem with a specific document, or a feature/process that's not addressed sufficiently in docs?
• Any other ideas or requests?

There is not unified tor installation per package manager. One can find for OpenBSD on the relay/setup/guard and relay/setup/bridge, in which the instructions differ.

Further details

• https://community.torproject.org/relay/setup/guard/openbsd/
• https://community.torproject.org/relay/setup/bridge/openbsd/

Proposal

My proposal is to maintain a tor/installation or any other name to instruct on ho to install tor per platform. The relay/setup guides will refer to this documentation and them they will slim down to just contain information about how to configure the wanted relay type.

Who can address the issue

@gus if possible, create a page https://community.torproject.org/tor/pkg-manager or something like it.