Hi, cool stuff, thanks for creating this PR. I'm currently a bit busy with some other stuff and an upcoming vacation, so I currently don't have the time to properly check this out, but will get to it sometime soon. Sorry for leaving this just open for now.

From what I've seen so far in the PR, it checks the loaded mods, and then checks if a matching wiki entry exists, and then downloads the wiki? One issue I see with this is that this will download mod wikis that aren't designed with oracle index in mind. A lot of html formatting just will not work ingame, so some wikis will be displayed wrong.
Maybe we could add an extra step somewhere in the wiki loading pipeline where we check if the mod has a flag set somewhere that actually enables the wiki to be loaded ingame? Some setting on the git repo maybe?

Yeah no problem, this was more like of a proof of concept/starting point thing. For the flagging of the wiki we could either have a custom setting in the fabric.mod.json (or neoforge equivalent) or a file in the repository's folder.
But I would think that the end goal should be supporting most of the tags, and also instead of compleatily disable the wiki from loading a big warning should be displayed. Like "Hey, this could render in a werid way because it isn't fully supported yet" or something like that.

Anyways, I am kinda busy with the exam session too, so no problem on waiting, enjoy your vacation!