Many QoL improvements & Resourcepack features

- Support Sodium 0.6+
- Allow resourcepacks to force culling and hide fully-encircled leaf blocks
- Force leaf culling when the smart leaves pack is enabled
- Reload world when the config changes
- Only apply Sodium mixins when Sodium is actually installed (Removes log spam)

common/src/main/java/eu/midnightdust/cullleaves/CullLeavesMixinPlugin.java

@@ -0,0 +1,32 @@
+package eu.midnightdust.cullleaves;
+
+import eu.midnightdust.lib.util.PlatformFunctions;
+import org.objectweb.asm.tree.ClassNode;
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.util.List;
+import java.util.Set;
+
+public class CullLeavesMixinPlugin implements IMixinConfigPlugin {
+    private String mixinPackage;
+
+    @Override
+    public void onLoad(String mixinPackage) {
+        this.mixinPackage = mixinPackage + ".";
+    }
+
+    @Override
+    public boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+        final String mixinName = mixinClassName.substring(this.mixinPackage.length());
+
+        if (mixinName.indexOf('.') < 0) return true;
+        return PlatformFunctions.isModLoaded(mixinName.substring(0, mixinName.indexOf('.')));
+    }
+
+    @Override public List<String> getMixins() { return null; }
+    @Override public String getRefMapperConfig() { return null; }
+    @Override public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) {}
+    @Override public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {}
+    @Override public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {}
+}