feat: add options for Mistral AI (#707) #none

* add Mistral AI emb AI embedding vendor, types

* add mistral env setting to example

* add mistral LLM option

* chore: fix default embedding back to normal

* fix: comfort CI

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Co-authored-by: Tadashi <tadashi@cinnamon.is>

.env.example

@@ -16,6 +16,9 @@ AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT=text-embedding-ada-002
 # settings for Cohere
 COHERE_API_KEY=<COHERE_API_KEY>
 
+# settings for Mistral
+# MISTRAL_API_KEY=placeholder
+
 # settings for local models
 LOCAL_MODEL=qwen2.5:7b
 LOCAL_MODEL_EMBEDDINGS=nomic-embed-text