docs on pass through support

docs/my-website/docs/proxy/configs.md

@@ -59,6 +59,13 @@ model_list:
       rpm: 1440
     model_info: 
       version: 2
+  
+  # Use this if you want to make requests to `claude-3-haiku-20240307`,`claude-3-opus-20240229`,`claude-2.1` without defining them on the config.yaml
+  # Default models
+  # Works for ALL Providers and needs the default provider credentials in .env
+  - model_name: "*" 
+    litellm_params:
+      model: "*"
 
 litellm_settings: # module level litellm settings - https://github.com/BerriAI/litellm/blob/main/litellm/__init__.py
   drop_params: True