feat: allow specifying static widgets to customizable home

this feature allows app developers to make the default layout so that
there can be widgets that cannot be deleted, resized or moved by the
users when they go to the custom homepage edit mode.

Signed-off-by: Heikki Hellgren <heikki.hellgren@op.fi>

packages/app/src/components/home/HomePage.tsx

@@ -15,14 +15,14 @@
  */
 
 import {
-  HomePageRandomJoke,
-  WelcomeTitle,
-  HeaderWorldClock,
   ClockConfig,
-  HomePageStarredEntities,
   CustomHomepageGrid,
-  HomePageToolkit,
+  HeaderWorldClock,
   HomePageCompanyLogo,
+  HomePageRandomJoke,
+  HomePageStarredEntities,
+  HomePageToolkit,
+  WelcomeTitle,
 } from '@backstage/plugin-home';
 import { Content, Header, Page } from '@backstage/core-components';
 import { HomePageSearchBar } from '@backstage/plugin-search';
@@ -64,6 +64,9 @@ const defaultConfig = [
     y: 0,
     width: 12,
     height: 1,
+    movable: false,
+    resizable: false,
+    deletable: false,
   },
   {
     component: 'WelcomeTitle',
@@ -77,7 +80,7 @@ const defaultConfig = [
     x: 0,
     y: 2,
     width: 12,
-    height: 1,
+    height: 2,
   },
 ];