Add a warning when using prefix commands that they're deprecated and will be removed.

events/messageCreate.js

@@ -11,6 +11,17 @@ module.exports = {
       if (!client.commands.has(command)) return;
 
       try {
+        message.channel.send({
+          embeds: [{
+            title: `<:AnitroxWarning:997565364718276669> Attention, ${message.author.username}!`,
+            description: `Anitrox will be moving entirely to slash commands in 1.4, You will no longer be able to use commands by typing ${config.prefix}command.\n Please use slash commands in the future. [Learn more](https://support.discord.com/hc/en-us/articles/1500000368501-Slash-Commands-FAQ)`,
+            color: 15548997,
+            footer: {
+              icon_url: message.author.displayAvatarURL(),
+              text: config.footerTxt
+            }
+          }]
+        });
         await client.commands.get(command)?.parseMessage(client, config, message, args);
       } catch (error) {
         console.error(error);