Forge 1.20

- Creative mode tabs are now a registry; the `BuildContents` event was renamed to `BuildCreativeModeTabContentsEvent` and moved it to its own class
- The pack format is now 15 for both resource packs and data packs
- `ScreenUtils` was deprecated in favor of a `GuiGraphics` extension
- Forge and the MDK were updated to Gradle 8 and FG6
- The Forge common config file was removed (it only contained the deprecated old fields for resource caching, which was removed in 1.19.3)
- Registry dummy entries were removed
- `RemappingVertexPipeline` was fixed to forward the `endVertex()` call
- Forge tool tags were removed in favor of vanilla ones

Co-authored-by: ChampionAsh5357 <ash@ashwork.net>
Co-authored-by: coehlrich <coehlrich@users.noreply.github.com>
Co-authored-by: Dennis C <11262040+XFactHD@users.noreply.github.com>
Co-authored-by: Matyrobbrt <matyrobbrt@gmail.com>

settings.gradle

@@ -1,6 +1,13 @@
 pluginManagement {
     repositories {
         gradlePluginPortal()
-        maven { url = 'https://maven.minecraftforge.net/' }
+        maven {
+            name = 'MinecraftForge'
+            url = 'https://maven.minecraftforge.net/'
+        }
     }
+}
+
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.5.0'
 }