Fix 1.20.4 compatibility

[Technici4n]

The following changes from the legacy plugin basically need to be used in any version before the FML rework in 1.20.5:

• The client-extra artifact needs a special name.
• The Minecraft classes artifact needs to be on the legacy classpath.
• MOD_CLASSES environment variable.

[neoforged-pr-publishing]

• Publish PR to GitHub Packages

Last commit published: bb0933bbc2bd66466340a3e7640e07e2210c6440.

PR Publishing

The artifacts published by this PR:

• 📦 net.neoforged.moddev.legacyforge:net.neoforged.moddev.legacyforge.gradle.plugin:2.0.71-beta-pr-212-fix-1.20.4
• 📦 net.neoforged.moddev.repositories:net.neoforged.moddev.repositories.gradle.plugin:2.0.71-beta-pr-212-fix-1.20.4
• 📦 net.neoforged.moddev:net.neoforged.moddev.gradle.plugin:2.0.71-beta-pr-212-fix-1.20.4
• 📦 net.neoforged:moddev-gradle:2.0.71-beta-pr-212-fix-1.20.4

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 #212' // https://github.com/neoforged/ModDevGradle/pull/212
        url 'https://prmaven.neoforged.net/ModDevGradle/pr212'
        content {
            includeModule('net.neoforged.moddev.legacyforge', 'net.neoforged.moddev.legacyforge.gradle.plugin')
            includeModule('net.neoforged.moddev.repositories', 'net.neoforged.moddev.repositories.gradle.plugin')
            includeModule('net.neoforged.moddev', 'net.neoforged.moddev.gradle.plugin')
            includeModule('net.neoforged', 'moddev-gradle')
        }
    }
}

[neoforged-automation]

@Technici4n, this pull request has conflicts, please resolve them for this PR to move forward.

[neoforged-releases]

🚀 This PR has been released as ModDevGradle version 2.0.68-beta.