Added Menu to Gem Catalog with Action to Navigate to Gem Repo Screen (#4829)

* Added menu to Gem Catalog that with option to navigate to Gem Repo screen

Signed-off-by: nggieber <nggieber@amazon.com>

* Changed Goto to GoTo and added a tr

Signed-off-by: nggieber <nggieber@amazon.com>

* Gem repo button works from new project creation workflow as well and users are warned if they have pending changes in the gem catalog before changing screens.

Signed-off-by: nggieber <nggieber@amazon.com>

Code/Tools/ProjectManager/Source/ScreenWidget.h

@@ -47,6 +47,14 @@ namespace O3DE::ProjectManager
             return tr("Missing");
         }
 
+        virtual bool ContainsScreen([[maybe_unused]] ProjectManagerScreen screen)
+        {
+            return false;
+        }
+        virtual void GoToScreen([[maybe_unused]] ProjectManagerScreen screen)
+        {
+        }
+
         //! Notify this screen it is the current screen 
         virtual void NotifyCurrentScreen()
         {
@@ -55,7 +63,7 @@ namespace O3DE::ProjectManager
 
     signals:
         void ChangeScreenRequest(ProjectManagerScreen screen);
-        void GotoPreviousScreenRequest();
+        void GoToPreviousScreenRequest();
         void ResetScreenRequest(ProjectManagerScreen screen);
         void NotifyCurrentProject(const QString& projectPath);
         void NotifyBuildProject(const ProjectInfo& projectInfo);