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/en/configuration.md

@@ -156,7 +156,7 @@ raft_peers = "node2:9001,node3:9001"
 ```
 
 ```
-BaraDB v0.1.0 — Multimodal Database Engine
+BaraDB v1.1.0 — Multimodal Database Engine
 
 Usage:
   baradadb [options]

docs/en/installation.md

@@ -144,7 +144,7 @@ strip build/baradadb
 
 ```bash
 ./build/baradadb --version
-# Expected: BaraDB v0.1.0 — Multimodal Database Engine
+# Expected: BaraDB v1.1.0 — Multimodal Database Engine
 ```
 
 ## Running Tests
@@ -259,7 +259,7 @@ db.close()
 ./build/baradadb
 
 # Expected output:
-# BaraDB v0.1.0 — Multimodal Database Engine
+# BaraDB v1.1.0 — Multimodal Database Engine
 # BaraDB TCP listening on 127.0.0.1:9472
 
 # Test with HTTP API