refactor: drop skill file, rework client

utils/data.ts

@@ -0,0 +1,13 @@
+import fs from "node:fs";
+import path from "node:path";
+
+let dataDir: string = "./data";
+
+export function initDataDir(dir: string): void {
+  dataDir = path.resolve(dir);
+  fs.mkdirSync(dataDir, { recursive: true });
+}
+
+export function configFilePath(): string {
+  return path.join(dataDir, "config.json");
+}