QmlDesigner: Update the document for Qt Design Studio and Python workflow

You can now export the design made with Qt Design Studio for Python.
This update tries to explain how that works. It also fixes some
older text.

Fixes: QDS-13486
Change-Id: Ibfc533ab0a319c209f60f3569ad31788de8eae69
Reviewed-by: Mats Honkamaa <mats.honkamaa@qt.io>

doc/qtdesignstudio/src/developers/studio-designer-developer-workflow.qdoc

@@ -27,6 +27,13 @@
     \e CMakeLists.txt file as the project file. This enables you to share
     your project as a fully working C++ application with developers.
 
+    You can also enable \QDS projects for Python development. When enabled,
+    \QDS creates a Python folder within the project folder with the file
+    \e {main.py}. Use this file to start the development in Python for the UI
+    made with \QDS.
+
+    \section1 Exporting a \QDS Project for C++ Development
+
         To export a \QDS project for Qt Creator, you need:
 
         \list
@@ -34,8 +41,6 @@
             \li \QDS 4.5 or above.
         \endlist
 
-    \section1 Exporting a \QDS Project
-
         \list 1
             \li \l {Creating a Project} {Create} or open your \QDS project with \QDS 4.5 or above.
 
@@ -44,14 +49,14 @@
                     used in your Qt Creator.
 
             \li Go to \uicontrol {File} > \uicontrol {Export Project}
-                > \uicontrol {Enable Automatic CMake Generation}. This creates a
+                > \uicontrol {Enable CMake Generator}. This creates a
                 \e {CMakeLists.txt} file in your project folder.
 
-                \note Enabling this option tracks the changes made to the project in Qt Creator
-                    and automatically updates in \QDS. The connection works unless you
+                \note Enabling this option tracks the changes made to the project in \QDS
+                    and automatically updates in Qt Creator. The connection works unless you
                     deactivate the option.
 
-            \image studio-project-export.webp "Exporting Qt Design Studio project"
+            \image studio-project-export-cmake.webp "Exporting Qt Design Studio project to CMake"
         \endlist
 
     \section1 Opening the \QDS Project in Qt Creator
@@ -76,4 +81,81 @@
                 \image qtcreator-qt-design-studio-project.webp "Qt Design studio projects in Qt Creator after successful import"
             \li To run the project, select \uicontrol Run.
         \endlist
+
+        \note \QDS 4.4 and earlier versions have a project structure where
+        different explicit import paths such as \e imports or \e asset_imports
+        reference assets such as images or mesh files separately in their own
+        scope. So, linking them from one module to another does not work in the
+        generated CMake-based C++ application. Such cross-modular references are
+        not considered good practice. Since \QDS 4.5, this issue has been solved.
+        All the import assets are now bundled in the same folder, so the CMake
+        generation works properly.
+
+    \section1 Exporting a \QDS Project for Python Development
+
+        \list 1
+            \li \l {Creating a Project} {Create} a project with \QDS 4.5 or above.
+                    Then open your \QDS project with \QDS 4.6 or above.
+
+                \note You cannot export a project created with \QDS 4.4 or an
+                earlier version of \QDS for Python development.
+
+            \li Go to \uicontrol {File} > \uicontrol {Export Project}
+                > \uicontrol {Enable Python Generator}. This creates a
+                Python folder in your project folder. You can find the
+                \e {main.py} file in the Python folder. This file is
+                necessary for working in Python.
+
+                \note Do not modify the contents of the \e {autogen} folder inside
+                    the Python folder manually; they are overwritten with each
+                    change you make in the project.
+
+            \image studio-project-export-python.webp "Exporting Qt Design Studio project to Python"
+        \endlist
+
+    \section1 Opening the \QDS Project with Python
+
+        After your project have the Python folder and the \e {main.py} file
+        available, you can start setting up your Python environment for developing
+        with \QDS projects.
+
+        \table
+            \row
+                \li {2,1} \image studio-project-export-python-folder.webp "The generated Python folder in the Qt Design Studio project"
+                \li {2,2} \image studio-project-export-python-file.webp "The generated Python file in the Qt Design Studio project"
+        \endtable
+        \list 1
+            \li If you don't have Python installed on your computer, install it.
+                The latest version of Python is available
+                \l {https://www.python.org/downloads/} {here}.
+
+            \li Next, follow the steps from this document to
+                \l {https://doc.qt.io/qtforpython-6/quickstart.html} {install PySide6}.
+                You need this for working with Qt in Python.
+
+                \note You need Python version between 3.8 and 3.13 to install
+                    PySide6.
+
+            \li After installing PySide6, install \QDS packages for PySide6. Stay
+                in the virtual environment that was accessed for installing
+                PySide6. From there, execute the command in the command prompt.
+                \code
+                    pip install PySide6_DS
+                \endcode
+
+            \li Go to your project folder in the command prompt.
+                \code
+                    cd path/to/your/project/folder
+                \endcode
+
+            \li Finally, run the command below in the command prompt to open the
+                \e {main.py} file from your project.
+                \code
+                    python Python\main.py
+                \endcode
+        \endlist
+
+        Your \QDS project now runs in Python. Use Python to add more
+        functionalities to the project. Go to \l {Qt for Python} to learn more
+        about developing Qt projects using Python.
 */