make Registry immutable, remove other registry implementations

common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/api/monad/Init.java

@@ -4,15 +4,25 @@ import com.dfsek.terra.addons.manifest.impl.InitInfo;
 import com.dfsek.terra.api.util.function.Functions;
 import com.dfsek.terra.api.util.function.monad.Monad;
 
+import io.vavr.Function0;
+import io.vavr.Function1;
+
+import java.util.function.Consumer;
 import java.util.function.Function;
 
 
 public class Init<T> implements Monad<T, Init<?>> {
     private final Function<InitInfo, T> get;
     
-    public static <T> Init<T> of(Function<InitInfo, T> get) {
+    protected static <T> Init<T> of(Function<InitInfo, T> get) {
         return new Init<>(get);
     }
+    protected static Init<Void> unit(Consumer<InitInfo> get) {
+        return new Init<>(info -> {
+            get.accept(info);
+            return null;
+        });
+    }
     
     private Init(Function<InitInfo, T> get) {
         this.get = get;

common/addons/manifest-addon-loader/src/main/java/com/dfsek/terra/addons/manifest/api/monad/Register.java

@@ -0,0 +1,22 @@
+package com.dfsek.terra.addons.manifest.api.monad;
+
+import com.dfsek.terra.api.registry.key.Keyed;
+import com.dfsek.terra.api.util.function.monad.Monad;
+import com.dfsek.terra.api.util.reflection.TypeKey;
+
+
+public class Register {
+    private static <T> Monad<Void, Init<?>> register(TypeKey<T> type, String key, T object) {
+        return Init.unit(info -> {
+            throw new UnsupportedOperationException("TODO");
+        });
+    }
+    
+    public static <T> Monad<Void, Init<?>> register(Class<T> clazz, String key, T object) {
+        return register(TypeKey.of(clazz), key, object);
+    }
+    
+    public static <T extends Keyed<T>> Monad<Void, Init<?>> register(Class<T> clazz, Keyed<T> keyed) {
+        return register(TypeKey.of(clazz), keyed.getID(), keyed.coerce());
+    }
+}