Buildable and importable in modern IDEs

**Disclaimer: We do not support ForgeGradle 2. The changes made to the buildscript are purely to allow the project to be imported into modern IDEs for research and archival purposes.**

ForgeGradle 2.3 returns with 0 changes! Aside from that, you can now import the project into the latest version of IntelliJ IDEA. I tested this version in Maven Local using the latest 1.12 MDK (not to be confused with 1.12.2), and the setup works as expected from the terminal.

Here's how I accomplished this:
- Ported the buildscript to Gradle 9.
  - This includes all the changes made to our modern buildscripts. See `MinecraftForge/GradleUtils` for a good example.
- Use Nokee's redistribution of Gradle 2.14's API and Test Kit.
  - Yes, all tests pass.
- Did some funny things to ensure that the built artifacts are near identical to 2.3.7.
  - The only major difference is that the META-INF directory is no longer trimmed down.

Here's why I did this:
- Project preservation.
- It might be good to reference this code in an IDE when working on Mavenizer backports.
- To assert dominance.

Author: Jonathing

.github/workflows/publish.yml

@@ -2,19 +2,21 @@ name: Publish
 
 on:
   push:
-    branches: [ "FG_2.3" ]
+    branches: [ 'FG_2.3' ]
+    paths-ignore:
+      - '.github/workflows/**'
+      - 'docs/**'
+      - 'README.md'
 
 permissions:
   contents: read
 
 jobs:
   build:
-    uses: MinecraftForge/SharedActions/.github/workflows/gradle.yml@main
+    uses: MinecraftForge/SharedActions/.github/workflows/gradle.yml@v0
     with:
-      java: 8
-      gradle_tasks: "uploadArchives"
-      artifact_group: "net.minecraftforge.gradle"
-      artifact_name: "ForgeGradle"
+      java: 17
+      gradle_tasks: 'check publish'
     secrets:
       DISCORD_WEBHOOK: ${{ secrets.DISCORD_WEBHOOK }}
       PROMOTE_ARTIFACT_WEBHOOK: ${{ secrets.PROMOTE_ARTIFACT_WEBHOOK }}

.gitignore

@@ -1,21 +1,77 @@
-# gradle
+### Java template
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*
+
+### Intellij+all template
+# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio, WebStorm and Rider
+# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
+
+# CMake
+cmake-build-*/
+
+# File-based project format
+*.iws
+
+# IntelliJ
+.idea/
+out/
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+### Gradle template
 .gradle
-build
+**/build/
+!**/src/**/build/
+
+# Ignore Gradle GUI config
 gradle-app.setting
 
-# GMCP plugin
-/minecraft
+# Avoid ignoring Gradle wrapper jar file (.jar files are usually ignored)
+!gradle-wrapper.jar
 
-# eclipse
-.settings
-.metadata
-.classpath
-.project
-bin
+# Avoid ignore Gradle wrappper properties
+!gradle-wrapper.properties
+
+# Cache of project
+.gradletasknamecache
 
-# intellij
-out
-*.idea
-*.iml
+# Eclipse Gradle plugin generated files
+# Eclipse Core
+.project
+# JDT-specific (Eclipse Java Development Tools)
+.classpath
 
-/repo/
+# Local Repository
+repo/