Switch from FG to archloom + essential-gradle-toolkit

- Upgrade Gradle to 8.7
- Increase build daemon max memory to 8GB because archloom can compile a lot
  more projects at the same time.
- Disable Minecraft 1.8 (not 1.8.9) because archloom fails to set up for that

gradle.properties

@@ -1,6 +1,9 @@
+essential.defaults.loom=0
+essential.defaults.loom.fabric-loader=net.fabricmc:fabric-loader:0.15.11
+
 # Sets default memory used for gradle commands. Can be overridden by user or command line properties.
 # This is required to provide enough memory for the Minecraft decompilation process.
-org.gradle.jvmargs=-Xmx3G
+org.gradle.jvmargs=-Xmx8G
 org.gradle.daemon=false
 org.gradle.parallel=true
 org.gradle.configureondemand=true