feat: Add /config admin command to dynamically edit and save bot configuration.

src/lib/config.ts

@@ -1,7 +1,7 @@
-import { readFileSync, existsSync } from 'fs';
-import { join } from 'path';
+import { readFileSync, existsSync, writeFileSync } from 'node:fs';
+import { join } from 'node:path';
 
-const configPath = join(process.cwd(), 'src', 'config', 'config.json');
+const configPath = join(import.meta.dir, '..', '..', 'config', 'config.json');
 
 export interface GameConfigType {
     leveling: {
@@ -81,3 +81,16 @@ reloadConfig();
 
 // Backwards compatibility alias
 export const GameConfig = config;
+
+export function saveConfig(newConfig: GameConfigType) {
+    const replacer = (key: string, value: any) => {
+        if (typeof value === 'bigint') {
+            return value.toString();
+        }
+        return value;
+    };
+
+    const jsonString = JSON.stringify(newConfig, replacer, 4);
+    writeFileSync(configPath, jsonString, 'utf-8');
+    reloadConfig();
+}