Update Intel GPU stack and ipex-llm to latest available versions

- level-zero v1.22.4 -> v1.28.0
- IGC v2.11.7 -> v2.28.4
- compute-runtime 25.18.33578.6 -> 26.05.37020.3
- libigdgmm 22.7.0 -> 22.9.0
- ipex-llm ollama nightly 2.3.0b20250612 -> 2.3.0b20250725
- Docker compose: disable webui auth, stateless webui volume
- README formatting and GPU model update

Co-authored-by: Cursor <cursoragent@cursor.com>

docker-compose.yml

@@ -38,8 +38,8 @@ services:
   ollama-webui:
     image: ghcr.io/open-webui/open-webui:latest
     container_name: ollama-webui
-    volumes:
-      - ollama-webui:/app/backend/data
+    #volumes:
+    #  - ollama-webui:/app/backend/data
     depends_on:
       - ollama-intel-gpu
     ports:
@@ -51,7 +51,7 @@ services:
       #- OPENAI_API_KEY=
       #
       # AUTOMATIC1111_BASE_URL="http://localhost:7860"
-
+      - WEBUI_AUTH=False
       - ENABLE_RAG_WEB_SEARCH=True
 
       # DO NOT TRACK