add gpt cache to docs

docs/my-website/docs/caching/gpt_cache.md

@@ -0,0 +1,26 @@
+# Using GPTCache with LiteLLM
+
+GPTCache is a Library for Creating Semantic Cache for LLM Queries
+
+GPTCache Docs: https://gptcache.readthedocs.io/en/latest/index.html#
+GPTCache Github: https://github.com/zilliztech/GPTCache
+
+## Usage
+
+### Install GPTCache
+pip install gptcache
+
+### Using GPT Cache with Litellm Completion()
+
+```python
+from gptcache import cache
+from litellm.cache import completion
+
+# Set your .env keys 
+os.environ['OPENAI_API_KEY'] = ""
+cache.init()
+cache.set_openai_key()
+
+messages = [{"role": "user", "content": "what is litellm YC 22?"}]
+```
+

docs/my-website/sidebars.js

@@ -58,7 +58,14 @@ const sidebars = {
         "observability/supabase_integration",
       ],
     },
-    'caching',
+    {
+      type: "category",
+      label: "Caching",
+      items: [
+        "caching/caching",
+        "caching/gpt_cache",
+      ],
+    },
     {
       type: 'category',
       label: 'Extras',