Attendance and Employee Attendance done!!

Journal Done!!
But there is issue of validation in purchase due to lack of proper journals when getting data from the frontend.
The proposed solution is to create different schemas for various vouchers and then reexport and import them in a master schema for persisting

Also, change "Supplier" to vendor in Purchase, etc.
Also, convert all date field to date from datetime

Rename "Salary Deduction" to "Employee Benefits" across the board

overlord/src/app/issue/issue-resolver.service.ts

@@ -17,7 +17,7 @@ export class IssueResolver implements Resolve<Voucher> {
     if (id === null) {
       return this.ser.getOfType('Issue');
     } else {
-      return this.ser.get(id);
+      return this.ser.get(id, 'Issue');
     }
   }
 }