Add COD amount helper

[dt2patel]

What is the motivation for adding/enhancing this feature?

Add COD amount helper section so staff know easily how much COD to expect on their shipping label.

https://docs.google.com/document/d/1Z5VeHa66jqRUpWq-HjuEbn8mXkcZghSlMSDiyNQDskU/edit?tab=t.0#heading=h.t2o8w1t8effo

[ymaheshwari1]

API endpoint details that can be used here:

endpoint: /api/service/getCODOrderRemainingTotal
Request payload:

{
    "orderId": "10110"
}

Response:

{
    "total": 5.00
}

Constraint: If Order does not have COD payment preference then it returns 0.

For more details: 86cwmx2rw

[dt2patel]

@AjinkyaM1 can you identify which OMS version is compatible with this feature? Add the relevant version number to this ticket for tracking

[AjinkyaM1]

The backend changes have been pushed into the releases from version 5.18.0.