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/utils/color.ts

@@ -6,7 +6,7 @@ function componentToHex(c) {
 
 /**
  * https://axonflux.com/handy-rgb-to-hsl-and-rgb-to-hsv-color-model-c
- * 
+ *
  * Converts an HSL color value to RGB. Conversion formula
  * adapted from http://en.wikipedia.org/wiki/HSL_color_space.
  * Assumes h, s, and l are contained in the set [0, 1] and
@@ -45,4 +45,4 @@ function hslToRgb(h, s, l){
 export function randomColor() {
   let rgb = hslToRgb(Math.random(), 0.6, Math.random() * 0.4 + 0.4)
   return `#${componentToHex(rgb[0])}${componentToHex(rgb[1])}${componentToHex(rgb[2])}`
-}
+}

src-ui/src/app/utils/ngb-date-parser-formatter.ts

@@ -56,4 +56,4 @@ export class LocalizedDateParserFormatter extends NgbDateParserFormatter {
       return null
     }
   }
-}
+}