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;

package.json

@@ -11,6 +11,7 @@
   "license": "ISC",
   "dependencies": {
     "discord.js": "^14.22.1",
+    "dotenv": "^17.2.3",
     "mysql2": "^3.15.1"
   },
   "devDependencies": {