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/text/text.component.html

@@ -5,4 +5,4 @@
   <div class="invalid-feedback">
     {{error}}
   </div>
-</div>
+</div>