Update documentation and clients for v1.1.0

Documentation updates:
- Fix v0.1.0 → v1.1.0 version numbers in en, ru, fa, zh docs
- Add missing Window Functions, Multi-Tenant ERP, Supported Keywords sections
  to ru, fa, zh baraql.md (~105 lines each)
- Expand Turkish and Arabic baraql.md (110 → 268 lines)
- Expand Turkish and Arabic installation.md (62 → 307 lines)
- Add new Bulgarian documentation files (18 new files)

Client updates:
- Python: Full async/await rewrite with asyncio, request queueing
- Rust: Full async/await rewrite with tokio, async examples
- Nim: Update README to v1.1.0
- All clients now support async patterns consistently

docs/bg/api-websocket.md

@@ -0,0 +1,127 @@
+# WebSocket API
+
+Full-duplex стрийминг за данни в реално време и push известия.
+
+## Свързване
+
+```
+ws://localhost:9471
+```
+
+## Клиентски Пример
+
+```javascript
+const ws = new WebSocket('ws://localhost:9471');
+
+ws.onopen = () => {
+  console.log('Свързан');
+  ws.send(JSON.stringify({
+    type: 'query',
+    query: 'SELECT * FROM users'
+  }));
+};
+
+ws.onmessage = (event) => {
+  const data = JSON.parse(event.data);
+  console.log('Получено:', data);
+};
+```
+
+## Формат на Съобщенията
+
+```json
+{
+  "type": "query",
+  "id": "1",
+  "query": "SELECT * FROM users"
+}
+```
+
+## Типове Съобщения
+
+### Заявка (query)
+
+```json
+{
+  "type": "query",
+  "id": "1",
+  "query": "SELECT * FROM users"
+}
+```
+
+### Резултат (result)
+
+```json
+{
+  "type": "result",
+  "id": "1",
+  "columns": ["id", "name"],
+  "rows": [["1", "Alice"], ["2", "Bob"]]
+}
+```
+
+### Грешка (error)
+
+```json
+{
+  "type": "error",
+  "id": "1",
+  "code": "INVALID_QUERY",
+  "message": "Синтактична грешка"
+}
+```
+
+### Абониране (subscribe)
+
+Абониране за промени в таблица:
+
+```json
+{
+  "type": "subscribe",
+  "id": "sub1",
+  "table": "users"
+}
+```
+
+### Известие (notification)
+
+Push известие от сървъра:
+
+```json
+{
+  "type": "notification",
+  "table": "users",
+  "operation": "insert",
+  "data": {"id": 3, "name": "Charlie"}
+}
+```
+
+### Ping/Pong (keepalive)
+
+```json
+{"type": "ping", "id": "ping1"}
+```
+
+Отговор:
+```json
+{"type": "pong", "id": "ping1"}
+```
+
+## JavaScript Клиент
+
+```javascript
+class BaraDBClient {
+  constructor(url) {
+    this.ws = new WebSocket(url);
+    this.pending = new Map();
+  }
+
+  query(sql) {
+    return new Promise((resolve, reject) => {
+      const id = crypto.randomUUID();
+      this.pending.set(id, { resolve, reject });
+      this.ws.send(JSON.stringify({ type: 'query', id, query: sql }));
+    });
+  }
+}
+```