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/check/check.component.html

@@ -2,4 +2,4 @@
   <input type="checkbox" class="custom-control-input" [id]="inputId" [(ngModel)]="value" (change)="onChange(value)" (blur)="onTouched()" [disabled]="disabled">
   <label class="custom-control-label" [for]="inputId">{{title}}</label>
   <small *ngIf="hint" class="form-text text-muted">{{hint}}</small>
-</div>
+</div>