[IS][Xero] Add Continuous Reconciliation

[rlinoz]

We have specific paths for continuos reconciliation per integration, let's build up on the NetSuite PR to enable the other integrations to do the same.

Reference IS PR: https://github.com/Expensify/Integration-Server/pull/8935

Issue Owner

Current Issue Owner: @allgandalf

[rlinoz]

@s77rt @allgandalf if you can pick this up

[allgandalf]

Working on this in coming days....

[allgandalf]

PRs are here:

• https://github.com/Expensify/Integration-Server/pull/8988
• [HOLD IS 8988] Add Travel Invoicing CR to Xero advanced page #91506