Add help command and command categories

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

@@ -2,6 +2,7 @@ package wtf.beatrice.hidekobot.commands.message;
 
 import net.dv8tion.jda.api.Permission;
 import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import wtf.beatrice.hidekobot.objects.commands.CommandCategory;
 import wtf.beatrice.hidekobot.objects.commands.MessageCommand;
 
 import java.util.Arrays;
@@ -24,6 +25,11 @@ public class HelloCommand implements MessageCommand
         return false;
     }
 
+    @Override
+    public CommandCategory getCategory() {
+        return CommandCategory.FUN;
+    }
+
     @Override
     public void runCommand(MessageReceivedEvent event, String label, String[] args)
     {