[air example] train a Keras model on tabular data and serve it. (ray-project#24898)

Author: xwjiang2010

doc/source/_toc.yml

@@ -194,6 +194,8 @@ parts:
                   - file: ray-air/examples/xgboost_example
                   - file: ray-air/examples/huggingface_text_classification
                     title: "Fine-tune a 🤗 Transformers model"
+                  - file: ray-air/examples/tfx_tabular_train_to_serve
+                    title: "Train a Keras model with Tabular data and serve it"
               - file: ray-air/package-ref
           - file: ray-more-libs/joblib
           - file: ray-more-libs/lightgbm-ray

doc/source/ray-air/examples/index.rst

@@ -30,3 +30,11 @@ Hugging Face Examples
 ---------------------
 
 - :doc:`/ray-air/examples/huggingface_text_classification`: How to use Ray AIR to run Hugging Face Transformers fine-tuning on a text classification task.
+
+.. air-tabular-training-serving-examples:
+
+Tabular data training to serving example
+----------------------------------------
+
+- :doc:`/ray-air/examples/tfx_tabular_train_to_serve`: How to use Ray AIR to train a Keras model on tabular data and serve it.
+