Added copy to clipboard message click event

src/main/java/net/minestom/server/chat/ChatClickEvent.java

@@ -48,6 +48,11 @@ public class ChatClickEvent {
         return new ChatClickEvent("suggest_command", command);
     }
 
+    @NotNull
+    public static ChatClickEvent copyToClipboard(@NotNull String text) {
+        return new ChatClickEvent("copy_to_clipboard", text);
+    }
+
     @NotNull
     protected String getAction() {
         return action;

src/main/java/net/minestom/server/entity/Entity.java

@@ -356,7 +356,7 @@ public class Entity implements Viewable, EventHandler, DataContainer, Permission
     }
 
     @Override
-    public boolean removeViewer(@NotNull Player player) {
+    public final boolean removeViewer(@NotNull Player player) {
         synchronized (this.entityTypeLock) {
             return removeViewer0(player);
         }