GH-5232 Add Install NeoForge button
Add a button to install NeoForge. Depends on https://github.com/MultiMC/ForgeWrapper/pull/1 and https://github.com/MultiMC/meta/pull/18. Closes #5232.
(Untested obviously since there is no NeoForge metadata yet.)
I would also like to fix the very broken code to detect whether Fabric/Quilt are supported (which currently doesn't disable the Install Fabric/Quilt buttons on pre-1.0 versions), and add NeoForge support detection, before merging.
I've rewritten modloader support detection based on release date checks (like are currently used for detecting whether your Java version is too old), but it would probably be better to move these checks (and probably everything else in VersionFilterData) into meta at some point.