[MOV] howto/rdtraining: move "Getting started" to the tutorials dir

This commit also replaces references to the "Building a module"
tutorial by references to the "Getting started" tutorial.

task-2991663

Part-of: odoo/documentation#3655

content/developer/tutorials/getting_started.rst

@@ -0,0 +1,88 @@
+:show-content:
+
+.. _tutorials/getting_started:
+
+===============
+Getting started
+===============
+
+Welcome to the Getting Started Odoo tutorial! If you reached this page that means you are
+interested in the development of your own Odoo module. It might also mean that you recently
+joined the Odoo company for a rather technical position. In any case, your journey to the
+technical side of Odoo starts here.
+
+This training is split in two parts:
+
+- The first part is the :ref:`core training <tutorials/getting_started/core_training>`. Its
+  objective is to give you an insight of the most important parts of the Odoo development framework.
+  The chapters should be followed in their given order since they cover the development of a new
+  Odoo application from scratch in an incremental way. In other words, each chapter depends on the
+  previous one.
+- The second part covers a set of :ref:`advanced topics
+  <tutorials/getting_started/advanced_topics>`. Each topic can be followed independently, but
+  requires the :ref:`core training <tutorials/getting_started/core_training>`.
+
+.. attention::
+   Are you following this training as part of your technical onboarding as an Odoo employee? Then,
+   we ask you to complete the first part of the training before joining your new team and the second
+   part the month after.
+
+All topics are built around a business case we will enhance along the way. The reader is expected
+to actively take part in the training by writing the solution for each exercise.
+
+Ready? Let's get started!
+
+.. _tutorials/getting_started/core_training:
+
+Core training
+=============
+
+.. toctree::
+    :caption: Advanced Topics
+    :titlesonly:
+    :glob:
+
+    getting_started/0*
+    getting_started/1*
+
+* :doc:`getting_started/01_architecture`
+* :doc:`getting_started/02_setup`
+* :doc:`getting_started/03_newapp`
+* :doc:`getting_started/04_basicmodel`
+* :doc:`getting_started/05_securityintro`
+* :doc:`getting_started/06_firstui`
+* :doc:`getting_started/07_basicviews`
+* :doc:`getting_started/08_relations`
+* :doc:`getting_started/09_compute_onchange`
+* :doc:`getting_started/10_actions`
+* :doc:`getting_started/11_constraints`
+* :doc:`getting_started/12_sprinkles`
+* :doc:`getting_started/13_inheritance`
+* :doc:`getting_started/14_other_module`
+* :doc:`getting_started/15_qwebintro`
+* :doc:`getting_started/16_guidelines_pr`
+
+.. _tutorials/getting_started/advanced_topics:
+
+Advanced topics
+===============
+
+.. toctree::
+    :caption: Advanced Topics
+    :titlesonly:
+
+    getting_started/B_acl_irrules
+    getting_started/C_data
+    getting_started/D_mixins
+    getting_started/E_unittest
+    getting_started/J_reports
+    getting_started/K_dashboard
+    getting_started/N_security
+
+* :doc:`getting_started/B_acl_irrules`
+* :doc:`getting_started/C_data`
+* :doc:`getting_started/D_mixins`
+* :doc:`getting_started/E_unittest`
+* :doc:`getting_started/J_reports`
+* :doc:`getting_started/K_dashboard`
+* :doc:`getting_started/N_security`