Add tags implement

registry/README.md

@@ -0,0 +1,33 @@
+# Registry System
+
+instance {
+    ResourceLocation {
+        namespace: string
+        path: string
+    }
+
+    ResourceKey<T> {
+        registryName: ResourceLocation
+        location: ResourceLocation
+    }
+
+    registry<T> {
+        getId(T): int
+        byId(int): T
+
+        getKey(T): ResourceLocation
+        getResourceKey(T): ResourceKey<T>
+        get(ResourceKey<T>): T
+        get(ResourceLocation): T
+
+        getTags(TagKey<T>): (TagKey<T>, *T[])[]
+        getTagNames(): TagKey<T>[]
+        resetTags()
+        bindTags((TagKey<T>, *T[])[])
+    }[]
+
+    TagKey<T> {
+        *Registry<T>
+        ResourceLocation
+    }
+}