implement shortcut API

common/api/core/src/main/java/com/dfsek/terra/api/config/ConfigPack.java

@@ -62,5 +62,11 @@ public interface ConfigPack extends LoaderRegistrar, LoaderHolder, RegistryHolde
     
     RegistryFactory getRegistryFactory();
     
+    <T> ConfigPack registerShortcut(Type clazz, String shortcut, ShortcutLoader<T> loader);
+    
+    default <T> ConfigPack registerShortcut(Class<T> clazz, String shortcut, ShortcutLoader<T> loader) {
+        return registerShortcut((Type) clazz, shortcut, loader);
+    }
+    
     ChunkGeneratorProvider getGeneratorProvider();
 }

common/api/core/src/main/java/com/dfsek/terra/api/config/ShortcutLoader.java

@@ -0,0 +1,8 @@
+package com.dfsek.terra.api.config;
+
+import com.dfsek.tectonic.api.loader.ConfigLoader;
+
+
+public interface ShortcutLoader<T> {
+    T load(ConfigLoader configLoader, String input);
+}