Add @ForgeEvent

common/src/main/java/me/shedaniel/architectury/ForgeEvent.java

@@ -0,0 +1,11 @@
+package me.shedaniel.architectury;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
+public @interface ForgeEvent {
+}