Merge pull request #278 from aimlapi/docs/add-grok-4-3

docs: add x-ai/grok-4-3

Author: kristinaorekhova

docs/SUMMARY.md

@@ -196,6 +196,7 @@
     * [Grok 4.20 non-reasoning](api-references/text-models-llm/xai/grok-4-20-non-reasoning.md)
     * [Grok 4.20 reasoning](api-references/text-models-llm/xai/grok-4-20-reasoning.md)
     * [Grok Build 0.1](api-references/text-models-llm/xai/grok-build-0-1.md)
+    * [Grok 4.3](api-references/text-models-llm/xai/grok-4-3.md)
   * [Xiaomi](api-references/text-models-llm/xiaomi/README.md)
     * [mimo-v2-flash](api-references/text-models-llm/xiaomi/mimo-v2-flash.md)
     * [Mimo v2.5](api-references/text-models-llm/xiaomi/mimo-v2.5.md)

docs/api-references/model-database.md

@@ -0,0 +1,2 @@
+# xai
+