[WIP] adopt model replacement from Forge vesion

+ bunch of renames to bring the 2 version closer
+ at-least-not-crashing levels of Optifine support

src/main/java/mods/betterfoliage/MixinConfigPlugin.java

@@ -0,0 +1,49 @@
+package mods.betterfoliage;
+
+import net.fabricmc.loader.api.FabricLoader;
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+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 MixinConfigPlugin implements IMixinConfigPlugin {
+
+    Logger logger = LogManager.getLogger(this);
+
+    Boolean hasOptifine = null;
+
+    @Override
+    public boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+        if (hasOptifine == null) {
+            hasOptifine = FabricLoader.getInstance().isModLoaded("optifabric");
+            if (hasOptifine) logger.log(Level.INFO, "[BetterFoliage] Optifabric detected, applying Optifine mixins");
+            else logger.log(Level.INFO, "[BetterFoliage] Optifabric not detected, applying Vanilla mixins");
+        }
+        if (mixinClassName.endsWith("Vanilla") && hasOptifine) return false;
+        if (mixinClassName.endsWith("Optifine") && !hasOptifine) return false;
+        return true;
+    }
+
+    @Override
+    public void onLoad(String mixinPackage) { }
+
+    @Override
+    public String getRefMapperConfig() { return null; }
+
+    @Override
+    public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) { }
+
+    @Override
+    public List<String> getMixins() { return null; }
+
+    @Override
+    public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) { }
+
+    @Override
+    public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) { }
+}