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/input/number/number.component.html

@@ -11,4 +11,4 @@
   </div>
   <small *ngIf="hint" class="form-text text-muted">{{hint}}</small>
 
-</div>
+</div>