Create ADR for export Devices API(end point : /api/v1/devices/export)

[ShradhaGupta31]

Create ADR for a new console api which would export all the device details in json format

end point : /api/v1/devices/export

Device Discovery ADR: https://github.com/device-management-toolkit/console/wiki/ADR-discovery/4397f8312041e38d89a934cb910f731809c85c22

[ShradhaGupta31]

ADR for export API - https://github.com/device-management-toolkit/console/wiki/ADR-devices-export-api

[ShradhaGupta31]

ADR is finalized. Implementation WIP.