https://en.m.wikivoyage.org/wiki/Main_Page looks like what you want.

There are lots of wikis for specific domains, what are you looking to write a guide for?

• I would give it a similar but distinct name, and just be aboveboard in the docs about where people can find the original project, what the differences are, and about what’s going on. As long as you’re open about what’s up I think it would be hard for any reasonable person to take offense if you prefer a less unixy style of output or whatever.
• I would create an issue on the original project just explaining what you like and what you implemented in the new one, and saying you’re happy to contribute although the changes may not be wanted et cetera. Just be honest. You’re fine. More communication is usually a good thing.
• git is powerful. It’s worth learning about the concepts if you do decide to invest the effort. You don’t have to get into a crazy workflow, but having your own ongoing branch and being able to merge/rebase changes from upstream as they happen can make your life easier. However, like a lot of tools from that type of toolbox, it can also make your life a lot harder if you’re not certain of what you’re doing, so YMMV. I would try to read a specific guide about how to set up the workflow you want, not just the reference documentation. Git has a ton of features, 90+% of which you don’t need, and many of its core features are called strange things or work in an unintuitive way.

deleted by creator

I mean, having a big offtopic conversation (like this one is) is something that’s pretty legit for the mods to remove. I do understand why the digression about the-company-that-shall-not-be-named in the original keyboards thread was removed.

For the mod to take an axe to the comments in the second post, where people are trying to figure out even what TCTSNBN was and what its deal was, saying that what the mod knows is all that everyone needs to know, and no one is allowed to say anything else, is I think not really something that can be solved with an explanation in the comments or the sidebar. It’s not a “detail of the rules” thing. It’s a “Do I have enough respect for you to just give an explanation, and trust that people will take it seriously or not according to their own determination? Or do I need to remove anyone with any kind of dissenting judgement and leave only my own judgement, because that’s the one that is correct, and people might be poisoned if they see the incorrect one which is propaganda?” type of thing.

1. Dude, just go somewhere that isn’t lemmy.ml if you don’t like the censorship style of moderation.
2. I would let it go, TBH. I do get it. I felt the same when I first joined with Lemmy and found I couldn’t just say what I wanted to say. I actually tried to make this case to one of the lemmy.ml moderators a few days ago, for exactly this reason. But it sounds like their minds are pretty much made up, and arguing the case isn’t going to accomplish much. I think just find a different place instead of adding dispute to the daily menu.

You can use Creative Commons. You’ll still have the copyright to the work, so you can relicense it or do whatever you like with it, but they’ll have a particular and proscribed set of things they are guaranteed to be able to do with it into perpetuity.

Choose whichever license suits what you’d like to be able to grant them, in terms of whether they have to credit you for it, whether they’re allowed to modify it, and so on. CC BY lets them do whatever they want, as long as they credit you, which is a common permissive option.