Port to 1.21.2

[shartte]

No description provided.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: bcfa8af86e15785071bb1d7b69abfdab1554f6fb.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged:neoforge:21.2.0-alpha.1.21.2-rc1.20241020.210350
• 📦 net.neoforged:testframework:21.2.0-alpha.1.21.2-rc1.20241020.210350

Repository Declaration

In order to use the artifacts published by the PR, add the following repository to your buildscript:

repositories {
    maven {
        name 'Maven for PR #1590' // https://github.com/neoforged/NeoForge/pull/1590
        url 'https://prmaven.neoforged.net/NeoForge/pr1590'
        content {
            includeModule('net.neoforged', 'neoforge')
            includeModule('net.neoforged', 'testframework')
        }
    }
}

MDK installation

In order to setup a MDK using the latest PR version, run the following commands in a terminal.
The script works on both *nix and Windows as long as you have the JDK bin folder on the path.
The script will clone the MDK in a folder named NeoForge-pr1590.
On Powershell you will need to remove the -L flag from the curl invocation.

mkdir NeoForge-pr1590
cd NeoForge-pr1590
curl -L https://prmaven.neoforged.net/NeoForge/pr1590/net/neoforged/neoforge/21.2.0-alpha.1.21.2-rc1.20241020.210350/mdk-pr1590.zip -o mdk.zip
jar xf mdk.zip
rm mdk.zip || del mdk.zip

To test a production environment, you can download the installer from here.

[neoforged-automation]

@shartte, this pull request has conflicts, please resolve them for this PR to move forward.