Project Manager - Barebones UI Made for All Screens with Basic Flow (#507)

* Created all barebone screens, a screen factory, and connected basic transitions between screens

* Changed ProjectManager namespace to O3DE::ProjectManager, removed empty new lines, switch to aznumberic_cast usage

* Project Manager - Moved Qt directory into source

Code/Tools/ProjectManager/source/Qt/ProjectSettings.cpp

@@ -0,0 +1,42 @@
+/*
+ * All or portions of this file Copyright (c) Amazon.com, Inc. or its affiliates or
+ * its licensors.
+ *
+ * For complete copyright and license terms please see the LICENSE at the root of this
+ * distribution (the "License"). All use of this software is governed by the License,
+ * or, if provided, by the license below or the license accompanying this file. Do not
+ * remove or modify any license notices. This file is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ */
+
+#include <Qt/ProjectSettings.h>
+
+#include <Qt/ui_ProjectSettings.h>
+
+namespace O3DE::ProjectManager
+{
+    ProjectSettings::ProjectSettings(ProjectManagerWindow* window)
+        : ScreenWidget(window)
+        , m_ui(new Ui::ProjectSettingsClass())
+    {
+        m_ui->setupUi(this);
+
+        ConnectSlotsAndSignals();
+    }
+
+    ProjectSettings::~ProjectSettings()
+    {
+    }
+
+    void ProjectSettings::ConnectSlotsAndSignals()
+    {
+        QObject::connect(m_ui->gemsButton, &QPushButton::pressed, this, &ProjectSettings::HandleGemsButton);
+    }
+
+    void ProjectSettings::HandleGemsButton()
+    {
+        m_projectManagerWindow->ChangeToScreen(ProjectManagerScreen::GemCatalog);
+    }
+
+} // namespace O3DE::ProjectManager