Organize the tutorials in Qt Widgets so they are visible and reachable

This commit makes visible in the TOC:
- both of the tutorials
- a set of examples for completer, undo framework, and regex'es

Fixes: QTBUG-129818
Change-Id: Id6636782789c4e5b11349af3c4fb33f75035f1a0
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

examples/widgets/tutorials/notepad/gettingstartedqt.qdoc

@@ -2,8 +2,9 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
 
 /*!
-    \example tutorials/notepad
+    \page widgets-getting-started.html
     \title Getting Started Programming with Qt Widgets
+    \ingroup widget-tutorials
     \examplecategory {User Interface Components}
     \brief A tutorial for Qt Widgets based notepad application.
 

src/widgets/doc/src/qtwidgets-examples.qdoc

@@ -142,3 +142,16 @@
     also supports keyboard shortcuts and accelerator keys in menu items.
 
 */
+
+/*!
+    \group examples-widgets-tools
+    \ingroup all-examples
+    \title Widget Tools Examples
+    \brief Using autocomplete features, regular expressions, and undo framework.
+
+    \image completer-example.png
+
+    Qt provides the functionality for autocomplete, Undo/Redo actions, and
+    regular expressions for the Widget-based applications.
+
+*/

src/widgets/doc/src/qtwidgets-toc.qdoc

@@ -42,13 +42,7 @@
     \li \l {Gestures in Widgets and Graphics View}
     \li \l {Graphics View Framework}
     \li \l {Changes to Qt Widgets}{Upgrading form Qt 5}
-    \li \l {Widgets Tutorial}
-        \list
-            \li \l{Widgets Tutorial - Creating a Window}{Creating a Window}
-            \li \l{Widgets Tutorial - Child Widgets}{Child Widgets}
-            \li \l{Widgets Tutorial - Using Layouts}{Using Layouts}
-            \li \l{Widgets Tutorial - Nested Layouts}{Nested Layouts}
-        \endlist
+    \li \l {Qt Widgets Tutorials}{Tutorials}
     \li \l {Qt Widgets Examples}{Examples}
         \list
             \li \l{Main Window Examples}
@@ -58,6 +52,7 @@
             \li \l{Painting Examples}
             \li \l{Rich Text Examples}
             \li \l{Graphics View Examples}
+            \li \l{Widget Tools Examples}
         \endlist
     \endlist
 

src/widgets/doc/src/qtwidgets-tutorials.qdoc

@@ -0,0 +1,15 @@
+// Copyright (C) 2024 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+/*!
+    \page widget-tutorials.html
+    \title Qt Widgets Tutorials
+    \brief Tutorials of how to use different kinds of widgets.
+
+    \image notepad1.png "Notepad application"
+
+    Qt comes with a large range of standard widgets that users of modern
+    applications have come to expect.
+
+    \annotatedlist widget-tutorials
+*/

src/widgets/doc/src/widgets-tutorial.qdoc

@@ -3,7 +3,7 @@
 
 /*!
     \page widgets-tutorial.html
-    \ingroup tutorials
+    \ingroup widget-tutorials
     \title Widgets Tutorial
     \brief This tutorial covers basic usage of widgets and layouts, showing how
     they are used to build GUI applications.