Implement base methods for tags

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/tag/CraftTag.java

@@ -1,5 +1,6 @@
 package org.bukkit.craftbukkit.tag;
 
+import java.util.Objects;
 import net.minecraft.core.HolderSet;
 import net.minecraft.core.IRegistry;
 import net.minecraft.tags.TagKey;
@@ -29,4 +30,30 @@ public abstract class CraftTag<N, B extends Keyed> implements Tag<B> {
     public NamespacedKey getKey() {
         return CraftNamespacedKey.fromMinecraft(tag.location());
     }
+
+    @Override
+    public int hashCode() {
+        int hash = 3;
+        hash = 59 * hash + Objects.hashCode(this.registry);
+        hash = 59 * hash + Objects.hashCode(this.tag);
+        return hash;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        }
+
+        if (!(obj instanceof CraftTag<?, ?> other)) {
+            return false;
+        }
+
+        return Objects.equals(this.registry, other.registry) && Objects.equals(this.tag, other.tag);
+    }
+
+    @Override
+    public String toString() {
+        return "CraftTag{" + this.tag + '}';
+    }
 }