refactor: extract common utility

apps/client/src/views/utils/presentation.utils.ts

@@ -0,0 +1,10 @@
+import { ViewSettings } from 'ontime-types';
+
+/**
+ * Which colour should the timer have at a given moment
+ */
+export function getTimerColour(viewSettings: ViewSettings, showWarning: boolean, showDanger: boolean) {
+  if (showWarning) return viewSettings.warningColor;
+  if (showDanger) return viewSettings.dangerColor;
+  return viewSettings.normalColor;
+}