docs: add multi-language documentation (ru, fa, zh, tr, ar)

docs/fa/api-websocket.md

@@ -0,0 +1,67 @@
+# WebSocket API
+
+استریم تمام‌دوطرفه برای فیدهای داده real-time.
+
+## اتصال
+
+```
+ws://localhost:9471/ws
+```
+
+## مثال کلاینت
+
+```javascript
+const ws = new WebSocket('ws://localhost:9471/ws');
+
+ws.onopen = () => {
+  ws.send(JSON.stringify({
+    type: 'query',
+    sql: 'SELECT * FROM users'
+  }));
+};
+
+ws.onmessage = (event) => {
+  console.log('Received:', JSON.parse(event.data));
+};
+```
+
+## فرمت پیام
+
+```json
+{
+  "type": "query",
+  "id": "uuid",
+  "sql": "SELECT * FROM users"
+}
+```
+
+## انواع پیام
+
+### درخواست
+
+```json
+{
+  "type": "query",
+  "id": "123",
+  "sql": "SELECT * FROM users"
+}
+```
+
+### پاسخ
+
+```json
+{
+  "type": "result",
+  "id": "123",
+  "data": [{"id": 1, "name": "Alice"}]
+}
+```
+
+### اشتراک
+
+```json
+{
+  "type": "subscribe",
+  "table": "users"
+}
+```