[1.21.4] Reintroduce nested models in composite models

[XFactHD]

This PR adds back the ability to nest child models in composite models loaded by the neoforge:composite model loader instead of being forced to reference external model files for all children. This is particularly useful when each child only consists of a parent and very little additional metadata and splitting them up would require an exorbitant amount of additional files. The ability to specify references is kept as there are a lot of cases where using a separate file is preferable.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: 710c4f8f7994be9b6c5eb7243e5fd6043c598eb0.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged:neoforge:21.4.45-beta-pr-1802-inline_composite_children
• 📦 net.neoforged:testframework:21.4.45-beta-pr-1802-inline_composite_children

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 #1802' // https://github.com/neoforged/NeoForge/pull/1802
        url 'https://prmaven.neoforged.net/NeoForge/pr1802'
        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-pr1802.
On Powershell you will need to remove the -L flag from the curl invocation.

mkdir NeoForge-pr1802
cd NeoForge-pr1802
curl -L https://prmaven.neoforged.net/NeoForge/pr1802/net/neoforged/neoforge/21.4.45-beta-pr-1802-inline_composite_children/mdk-pr1802.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-releases]

🚀 This PR has been released as NeoForge version 21.4.46-beta.