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/abstract-input.ts

@@ -11,7 +11,7 @@ export class AbstractInputComponent<T> implements OnInit, ControlValueAccessor {
   constructor() { }
 
   onChange = (newValue: T) => {};
-  
+
   onTouched = () => {};
 
   writeValue(newValue: any): void {