Cleanroom Loader support

[ghost]

Please confirm the following.

• [x] I checked the existing issues for duplicate feature requests
• [x] I have checked that this feature request is not on our roadmap

What parts of Modrinth is your feature request related too?

Website, App

Is your suggested feature related to a problem? Please describe.

1.12.2 is still a pretty popular version for modding, but it's stuck with Java 8. Cleanroom Loader makes 1.12.2 run with Java as new as 25 (at the time of writing), which improves everything from loading times to fps, however neither the Modrinth App nor the website support it. This means that Cleanroom-only mods have to be marked as Forge, and the only way to run a Cleanroom instance is via the Cleanroom Relauncher mod, which is a bit inconvenient

Describe the solution you'd like

Adding support for Cleanroom Loader in the Modrinth App as well as on the website.

Describe alternatives you've considered

There is a 1.12.2 port of the lwjgl3ify mod which can do similar things (mainly running 1.12.2 with newer versions of Java), but it has much worse mod support than Cleanroom and hasn't been updated in a long time, plus it has the same disadvantages as the Cleanroom Relauncher mod.

Additional context

No response