Make help command use descriptions and usages

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

@@ -5,6 +5,7 @@ import net.dv8tion.jda.api.entities.Message;
 import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
 import net.dv8tion.jda.api.interactions.components.buttons.Button;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 import wtf.beatrice.hidekobot.Cache;
 import wtf.beatrice.hidekobot.commands.base.ClearChat;
 import wtf.beatrice.hidekobot.objects.commands.CommandCategory;
@@ -29,12 +30,25 @@ public class ClearCommand implements MessageCommand
     public boolean passRawArgs() {
         return false;
     }
+
     @NotNull
     @Override
     public CommandCategory getCategory() {
         return CommandCategory.MODERATION;
     }
 
+    @NotNull
+    @Override
+    public String getDescription() {
+        return "Clear the current channel's chat history.";
+    }
+
+    @Nullable
+    @Override
+    public String getUsage() {
+        return "[amount]";
+    }
+
     @Override
     public void runCommand(MessageReceivedEvent event, String label, String[] args)
     {