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

---------

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

libs/ktem/ktem/embeddings/manager.py

@@ -59,6 +59,7 @@ class EmbeddingManager:
             LCCohereEmbeddings,
             LCGoogleEmbeddings,
             LCHuggingFaceEmbeddings,
+            LCMistralEmbeddings,
             OpenAIEmbeddings,
             TeiEndpointEmbeddings,
         )
@@ -70,6 +71,7 @@ class EmbeddingManager:
             LCCohereEmbeddings,
             LCHuggingFaceEmbeddings,
             LCGoogleEmbeddings,
+            LCMistralEmbeddings,
             TeiEndpointEmbeddings,
         ]