feat: Update for Forge 1.21.4

forge/build.gradle

@@ -7,8 +7,6 @@ plugins {
 }
 
 mixin {
-    add(sourceSets.main, "${mod_id}.refmap.json")
-
     config("${mod_id}.mixins.json")
     config("${mod_id}.forge.mixins.json")
 }
@@ -119,4 +117,10 @@ modrinth {
     dependencies {
         required.project "balm"
     }
+}
+
+sourceSets.each {
+    def dir = layout.buildDirectory.dir("sourcesSets/$it.name")
+    it.output.resourcesDir = dir
+    it.java.destinationDirectory = dir
 }

forge/src/main/java/net/blay09/mods/kleeslabs/ForgeKleeSlabs.java

@@ -1,19 +1,22 @@
 package net.blay09.mods.kleeslabs;
 
 import net.blay09.mods.balm.api.Balm;
-import net.blay09.mods.balm.api.EmptyLoadContext;
 import net.blay09.mods.balm.api.client.BalmClient;
+import net.blay09.mods.balm.forge.ForgeLoadContext;
 import net.blay09.mods.kleeslabs.client.KleeSlabsClient;
-import net.minecraftforge.api.distmarker.Dist;
-import net.minecraftforge.fml.DistExecutor;
 import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
+import net.minecraftforge.fml.loading.FMLEnvironment;
 
 @Mod(KleeSlabs.MOD_ID)
 public class ForgeKleeSlabs {
 
-    public ForgeKleeSlabs() {
-        Balm.initialize(KleeSlabs.MOD_ID, EmptyLoadContext.INSTANCE, KleeSlabs::initialize);
-        DistExecutor.runWhenOn(Dist.CLIENT, () -> () -> BalmClient.initialize(KleeSlabs.MOD_ID, EmptyLoadContext.INSTANCE, KleeSlabsClient::initialize));
+    public ForgeKleeSlabs(FMLJavaModLoadingContext context) {
+        final var loadContext = new ForgeLoadContext(context.getModEventBus());
+        Balm.initialize(KleeSlabs.MOD_ID, loadContext, KleeSlabs::initialize);
+        if (FMLEnvironment.dist.isClient()) {
+            BalmClient.initialize(KleeSlabs.MOD_ID, loadContext, KleeSlabsClient::initialize);
+        }
     }
 
 }

forge/src/main/resources/kleeslabs.forge.mixins.json

@@ -3,7 +3,6 @@
   "minVersion": "0.8",
   "package": "net.blay09.mods.kleeslabs.forge.mixin",
   "compatibilityLevel": "JAVA_17",
-  "refmap": "kleeslabs.refmap.json",
   "mixins": [
   ],
   "client": [