Normalize whitespace in source files

Ensure that no source files have trailing whitespace at end of lines and ensure that all files end with a single trailing newline.

This also adds Github Actions to enforce whitespace conventions.

src-ui/src/app/components/common/confirm-dialog/confirm-dialog.component.ts

@@ -30,7 +30,7 @@ export class ConfirmDialogComponent implements OnInit {
 
   @Input()
   buttonsEnabled = true
-  
+
   confirmButtonEnabled = true
   seconds = 0