Add notebook for MLflow Tracing (#543)

* add notebook for MLflow Tracing
* add instruction for tracking server
* add readme for mlflow
* add community badge

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Signed-off-by: Tomu Hirata <[email protected]>
Co-authored-by: Guillaume Vernade <[email protected]>

Author: TomeHirata

examples/README.md

@@ -53,6 +53,7 @@ Some old examples are still using the legacy SDK, they should still work and are
 
 * [Personalized Product Descriptions with Weaviate](../examples/weaviate/personalized_description_with_weaviate_and_gemini_api.ipynb): Load data into a Weaviate vector DB, build a semantic search system using embeddings from the Gemini API, create a knowledge graph and generate unique product descriptions for personas using the Gemini API and Weaviate.
 * [Similarity Search using Qdrant](../examples/qdrant/Qdrant_similarity_search.ipynb): Load website data, build a semantic search system using embeddings from the Gemini API, store the embeddings in a Qdrant vector DB and perform similarity search using the Gemini API and Qdrant.
+* [MLflow Tracing for Observability](../examples/mlflow/MLflow_Observability.ipynb): Utilize MLflow tracing to capture detailed information about your interactions with Google GenAI APIs.
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