ajout du prefix dans le help

fonctions/getPrefix.js

@@ -0,0 +1,12 @@
+const db = require('./database.js');
+
+module.exports = async function getPrefix(serverId) {
+  const prefix = await new Promise((resolve, reject) => {
+    db.get(`SELECT * FROM config WHERE guildId = ? AND name = ?`, [serverId, 'prefix'], (err, row) => {
+      if (err) reject(err);
+      resolve(row);
+    });
+  });
+
+  return prefix ? prefix.value : '&';
+}