Provide an official (in-tree) port for NeoForge

[jellysquid3]

The current plan of record is to use Architectury to achieve mod loader independence for Sodium. The platform-specific code for Fabric and NeoForge will be located in separate modules, and they will both share a "common" module that is platform-agnostic.

Eventually, we anticipate this will eliminate the need for Forge ports of Sodium, and that it will overall lead to better mod compatibility (read: improved user experience) with Sodium on both platforms.

Things which are in scope:

• Providing a fully featured version of Sodium for the NeoForge platform that can sufficiently deprecate other forks
• Working with addon mods (notably Iris) to enable compatibility with Sodium on other platforms

Not in scope:

• Supporting mods which rely on internal ABI of the existing Forge forks
• Backporting existing versions of Sodium to older versions of Minecraft