build: Use prettier for typescript

Stop ignoring .ts files in prettier and fix existing issues.

src/app/pipes/datetime-format.pipe.ts

@@ -6,9 +6,7 @@ import * as moment from 'moment';
   name: 'datetimeFormat'
 })
 export class DatetimeFormatPipe implements PipeTransform {
-
-  constructor(private settingsService: SettingsService) {
-  }
+  constructor(private settingsService: SettingsService) {}
 
   transform(value: any, datetimeFormat?: string): any {
     const defaultDateFormat = this.settingsService.dateFormat.replace('dd', 'DD');