Add help command and command categories

src/main/java/wtf/beatrice/hidekobot/commands/message/ClearCommand.java

@@ -6,6 +6,7 @@ import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
 import net.dv8tion.jda.api.interactions.components.buttons.Button;
 import wtf.beatrice.hidekobot.Cache;
 import wtf.beatrice.hidekobot.commands.base.ClearChat;
+import wtf.beatrice.hidekobot.objects.commands.CommandCategory;
 import wtf.beatrice.hidekobot.objects.commands.MessageCommand;
 
 import java.util.Collections;
@@ -27,6 +28,10 @@ public class ClearCommand implements MessageCommand
     public boolean passRawArgs() {
         return false;
     }
+    @Override
+    public CommandCategory getCategory() {
+        return CommandCategory.MODERATION;
+    }
 
     @Override
     public void runCommand(MessageReceivedEvent event, String label, String[] args)