Chronos: Refactor document structure (#3839)

* add strcture change

* add change in index

* add change to index.rst

* revice the document

* add icons

* revise on the pages

* add readme update

* remove ood information

* change title

docs/readthedocs/source/doc/Chronos/Overview/deep_dive.rst

@@ -0,0 +1,18 @@
+Chronos Deep Dive
+=========
+
+* `Time Series Processing and Feature Engineering <data_processing_feature_engineering.md>`__ introduces how to load a built-in/customized dataset and carry out transformation and feature engineering on it.
+* `Time Series Forecasting <forecasting.md>`__ introduces how to build a time series forecasting application.
+* `Time Series Anomaly Detection <anomaly_detection.md>`__ introduces how to build a anomaly detection application.
+* `Generate Synthetic Sequential Data <simulation.md>`__ introduces how to build a series data generation application.
+* `Useful Functionalities <useful_functionalities.md>`__ introduces some functionalities provided by Chronos that can help you improve accuracy/performance or scale the application to a larger data. 
+
+.. toctree::
+    :maxdepth: 1
+    :hidden:
+
+    data_processing_feature_engineering.md
+    forecasting.md
+    anomaly_detection.md
+    simulation.md
+    useful_functionalities.md

docs/readthedocs/source/doc/Chronos/QuickStart/chronos-anomaly-detector.md

@@ -1,4 +1,4 @@
-# Anomaly Detector Quickstart
+# Detect Anomaly Point in Real Time Traffic Data
 
 ---
 

docs/readthedocs/source/doc/Chronos/QuickStart/chronos-autotsest-quickstart.md

@@ -1,4 +1,4 @@
-# AutoTSEstimator Quickstart
+# Tune a Forecasting Task Automatically
 
 ---
 

docs/readthedocs/source/doc/Chronos/QuickStart/chronos-tsdataset-forecaster-quickstart.md

@@ -1,4 +1,4 @@
-# TSDataset and Forecaster Quickstarts
+# Predict Number of Taxi Passengers with Chronos Forecaster
 
 ---
 

docs/readthedocs/source/doc/Chronos/QuickStart/index.md

@@ -0,0 +1,19 @@
+# Chronos Tutorial
+
+- [**Predict Number of Taxi Passengers with Chronos Forecaster**](./chronos-tsdataset-forecaster-quickstart.html)
+
+    ![](../../../../image/colab_logo_32px.png)[Run in Google Colab](https://colab.research.google.com/github/intel-analytics/BigDL/blob/branch-2.0/python/chronos/colab-notebook/chronos_nyc_taxi_tsdataset_forecaster.ipynb)  ![](../../../../image/GitHub-Mark-32px.png)[View source on GitHub](https://github.com/intel-analytics/BigDL/blob/branch-2.0/python/chronos/colab-notebook/chronos_nyc_taxi_tsdataset_forecaster.ipynb)
+
+    In this guide we will demonstrate how to use _Chronos TSDataset_ and _Chronos Forecaster_ for time series processing and predict number of taxi passengers.
+
+- [**Tune a Forecasting Task Automatically**](./chronos-autotsest-quickstart.html)
+
+    ![](../../../../image/colab_logo_32px.png)[Run in Google Colab](https://colab.research.google.com/github/intel-analytics/BigDL/blob/branch-2.0/python/chronos/colab-notebook/chronos_autots_nyc_taxi.ipynb)  ![](../../../../image/GitHub-Mark-32px.png)[View source on GitHub](https://github.com/intel-analytics/BigDL/blob/branch-2.0/python/chronos/colab-notebook/chronos_autots_nyc_taxi.ipynb)
+
+    In this guide we will demonstrate how to use _Chronos AutoTSEstimator_ and _Chronos TSPipeline_ to auto tune a time seires forecasting task and handle the whole model development process easily.
+
+- [**Detect Anomaly Point in Real Time Traffic Data**](./chronos-anomaly-detector.html)
+
+    ![](../../../../image/colab_logo_32px.png)[Run in Google Colab](https://colab.research.google.com/github/intel-analytics/BigDL/blob/branch-2.0/python/chronos/colab-notebook/chronos_minn_traffic_anomaly_detector.ipynb)  ![](../../../../image/GitHub-Mark-32px.png)[View source on GitHub](https://github.com/intel-analytics/BigDL/blob/branch-2.0/python/chronos/colab-notebook/chronos_minn_traffic_anomaly_detector.ipynb)
+
+    In this guide we will demonstrate how to use _Chronos Anomaly Detector_ for real time traffic data from the Twin Cities Metro area in Minnesota anomaly detection.

docs/readthedocs/source/index.rst

@@ -65,14 +65,8 @@ BigDL Documentation
    :caption: Chronos Overview
 
    doc/Chronos/Overview/chronos.md
-   doc/Chronos/Overview/data_processing_feature_engineering.md
-   doc/Chronos/Overview/forecasting.md
-   doc/Chronos/Overview/anomaly_detection.md
-   doc/Chronos/Overview/simulation.md
-   doc/Chronos/Overview/useful_functionalities.md
-   doc/Chronos/QuickStart/chronos-autotsest-quickstart.md
-   doc/Chronos/QuickStart/chronos-tsdataset-forecaster-quickstart.md
-   doc/Chronos/QuickStart/chronos-anomaly-detector.md
+   doc/Chronos/Overview/deep_dive.rst
+   doc/Chronos/QuickStart/index.md
 
 .. toctree::
    :maxdepth: 1