Remove config.json

Remove config.json (not secure) and replace with .env.

Update deploy-commands.js:
- const { token, clientId } = require('./config.json');
+ const { token, clientId } = process.env;

Update index.js:
- const { token, clientId } = require('./config.json');
+ const token = process.env.TOKEN;

deploy-commands.js

@@ -1,5 +1,5 @@
 const { REST, Routes } = require('discord.js');
-const { clientId, token } = require('./config.json');
+const { token, clientId } = process.env;
 const fs = require('node:fs');
 const path = require('node:path');