Immersive Portals, Survival Compatibility

Updated the mod to 1.21.1 and changed to NEO forge rather than fabric as the libraries I was previously using arn't maintained for this version.

This version should work fine, to use the portal wand in survival use /imm_ptl_client_debug config and go down to the option at the bottom labelled "allow portal wand in survival" (or something like that) and set it to true.

In order to use fabric mods with this you can use sinytra connector. I havn't managed to get any versions of gravity changed working with this as most arn't maintaned and don't include a 1.21.1 version. however one unoffical port does support this version, but is fabric only and requires mod menu which is incompatable with sinytra connector. If you find any way to make this work please leave a comment to help other people (and myself).

I cannot guarantee that I will continue to maintain this mod, and versions after 1.21.1 arn't supported by many mods anyway.