[LYN-2514] Sorting gems in the gem catalog after retrieving all gem infos

Added <operator() for sorting the gems after retrieving the list of all gems.

Code/Tools/ProjectManager/Source/GemCatalog/GemInfo.cpp

@@ -79,4 +79,9 @@ namespace O3DE::ProjectManager
     {
         return (m_platforms & platform);
     }
+
+    bool GemInfo::operator<(const GemInfo& gemInfo) const
+    {
+        return (m_displayName < gemInfo.m_displayName);
+    }
 } // namespace O3DE::ProjectManager

Code/Tools/ProjectManager/Source/GemCatalog/GemInfo.h

@@ -61,6 +61,8 @@ namespace O3DE::ProjectManager
 
         bool IsValid() const;
 
+        bool operator<(const GemInfo& gemInfo) const;
+
         QString m_path;
         QString m_name = "Unknown Gem Name";
         QString m_displayName = "Unknown Gem Name";