add mistral models

.env.example

@@ -29,5 +29,10 @@ GOOGLE_GENERATIVE_AI_API_KEY=
 # EXAMPLE http://localhost:11434
 OLLAMA_API_BASE_URL=
 
+# Get your Mistral API Key by following these instructions -
+# https://console.mistral.ai/api-keys/
+# You only need this environment variable set if you want to use Mistral models
+MISTRAL_API_KEY=
+
 # Include this environment variable if you want more logging for debugging locally
 VITE_LOG_LEVEL=debug