thankfully minecraft.wiki has taken up the mantle. you can find the main page here: https://minecraft.wiki/w/Minecraft_Wiki:Projects/wiki.vg_merge/Protocol

and the status of the project overall here: https://minecraft.wiki/w/Minecraft_Wiki:Projects/wiki.vg_merge

note: while we do make heavy use of (what was) wiki.vg, ProtocolLib has no affiliation with the project itself and therefore we have no insight into its future