refactor: 客户端目录统一添加 kenaito-conf- 前缀

- go-client → kenaito-conf-go-client
- python-client → kenaito-conf-python-client
- python-client-demo → kenaito-conf-python-client-demo
- nodejs-client → kenaito-conf-nodejs-client
- nodejs-client-demo → kenaito-conf-nodejs-client-demo
- 更新所有 README 和 package.json 中的路径引用

kenaito-conf-nodejs-client/lib/cache.js

@@ -0,0 +1,25 @@
+import fs from 'node:fs';
+import path from 'node:path';
+
+const CACHE_FILE = 'config-cache.json';
+
+export class Cache {
+  constructor(cacheDir = '.') {
+    this.cacheDir = cacheDir;
+  }
+
+  write(data) {
+    const filePath = path.join(this.cacheDir, CACHE_FILE);
+    fs.writeFileSync(filePath, JSON.stringify(data, null, 2), 'utf8');
+  }
+
+  read() {
+    const filePath = path.join(this.cacheDir, CACHE_FILE);
+    try {
+      const content = fs.readFileSync(filePath, 'utf8');
+      return JSON.parse(content);
+    } catch {
+      return null;
+    }
+  }
+}