build: Use prettier for typescript

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

src/app/shared/validators/percentage.validator.ts

@@ -1,10 +1,9 @@
 import { AbstractControl, ValidatorFn } from '@angular/forms';
 
 export function rangeValidator(min: number, max: number): ValidatorFn {
-
   return (control: AbstractControl): { [key: string]: boolean } | null => {
     if (control.value !== undefined && (isNaN(control.value) || control.value < min || control.value > max)) {
-        return { 'range': true };
+      return { range: true };
     }
     return null;
   };