[PPML] Move dev guide to tutorial (#6765)

* Move dev guide to tutorial & examples.

docs/readthedocs/source/_toc.yml

@@ -235,13 +235,13 @@ subtrees:
                 - entries:
                   - file: doc/PPML/Overview/quicktour
                   - file: doc/PPML/QuickStart/end-to-end
+                  - file: doc/PPML/Overview/devguide
                   - file: doc/PPML/Overview/azure_ppml
             - file: doc/PPML/Overview/misc
               title: "Advanced Topics"
               subtrees:
                 - entries:
                   - file: doc/PPML/Overview/ppml
-                  - file: doc/PPML/Overview/devguide
                   - file: doc/PPML/Overview/trusted_big_data_analytics_and_ml
                   - file: doc/PPML/Overview/trusted_fl
                   - file: doc/PPML/QuickStart/secure_your_services

docs/readthedocs/source/doc/PPML/Overview/examples.rst

@@ -5,6 +5,8 @@ Tutorials & Examples
 
 * `PPML E2E Example <../QuickStart/end-to-end.html>`__ introduces the end-to-end PPML workflow using SimpleQuery as an example.
 
+* `Develop PPML application <../Overview/devguide.html>`__ introduces how to migrate/develop PPML applications.
+
 * `PPML E2E Example on Azure <../Overview/azure_ppml.html>`__ introduces the end-to-end PPML workflow on Azure Cloud using TPC-H as an example.
 
 * You can also find Trusted Data Analysis, Trusted ML, Trusted DL and Trusted FL examples in `more examples <https://github.com/intel-analytics/BigDL/tree/main/ppml/docs/examples.md>`__.

docs/readthedocs/source/doc/PPML/Overview/misc.rst

@@ -2,7 +2,6 @@ Advanced Topic
 ====================
 
 * `PPML User Guide <ppml.html>`_
-* `Develop your own Big Data & AI applications with BigDL PPML <devguide.html>`_
 * `Trusted Big Data Analytics and ML <trusted_big_data_analytics_and_ml.html>`_
 * `Trusted FL (Federated Learning) <trusted_fl.html>`_
 * `Secure Your Services <../QuickStart/secure_your_services.html>`_