Add flag ShowOnMainPage to show the component on demo list page (#32018)

Author: dxvladislavvolkov

apps/demos/menuMeta.json

@@ -5054,7 +5054,8 @@
             "NetCoreDescription": "",
             "MvcAdditionalFiles": [],
             "DemoType": "Web",
-            "Badge": "New"
+            "Badge": "New",
+            "ShowOnMainPage": true
           }
         ]
       },