feat: better ux for calc-schedule-budget

lib/dates.js

@@ -2,20 +2,20 @@ import { add, parse, format } from 'date-fns';
 
 const startNow = new Date();
 
-export function addFromFrequency(date, frequency, f = 'yyyy-MM') {
+export function addFromFrequency(date, frequency, interval = 1, f = 'yyyy-MM') {
   const toAdd = {};
   switch (frequency) {
     case 'daily':
-      toAdd.days = 1;
+      toAdd.days = interval;
       break;
     case 'weekly':
-      toAdd.weeks = 1;
+      toAdd.weeks = interval;
       break;
     case 'monthly':
-      toAdd.months = 1;
+      toAdd.months = interval;
       break;
     case 'yearly':
-      toAdd.years = 1;
+      toAdd.years = interval;
       break;
   
     default: