feat: Video selection page created

The SelectImageModal component has been refactored so that it can also be used on the video selection page; and all its child components.
Now this component is called SelectionModal and is used both for the image selector and in this new video selection screen.
The assets api has been used to get the videos.

src/editors/sharedComponents/SourceCodeModal/__snapshots__/index.test.jsx.snap

@@ -24,6 +24,7 @@ exports[`SourceCodeModal renders as expected with default behavior 1`] = `
     </Button>
   }
   footerAction={null}
+  isFullscreenScroll={true}
   isOpen={false}
   size="xl"
   title="Edit Source Code"