Finished GET detail of payslip
   - fixed the PR
   - Done Get payslip from xero
   - removed whitespace and added EOL

   [Finished #52761611]
Finished GET Payrun Xero Gateway

 - Fixed combained PR
 - Finished GET All and GET by id of PayRun
 - Removed whitespaces and added EOL

 [Finished #52031009]
fixed comflict
Fixed Conflict [#52031009]
Merge branch 'feat/pull-payrun-data-52031009' of https://github.com/Thinkei/xero_gateway into feat/pull-payrun-data-52031009

* 'feat/pull-payrun-data-52031009' of https://github.com/Thinkei/xero_gateway:
  fixed comflict
  Finished GET Payrun Xero Gateway