Marriage form create/update endpoints

[Siyasanga]

As a digitizer I want to save a new marriage record

As a digitizer I want to edit a marriage record

Tech tasks

• Create the POST /marriage endpoint
• Create the GET /marriage/:id endpoint
• Create the PUT /marriage/:id endpoint

Other tech task:
Ensure the request to POST /marriage is validated
Ensure the PUT request object is validated
Ensure POST requests to /marriage are authorised
Ensure GET requests to /marriage/:id are authorised
Ensure PUT requests to /marriage/:id are authorised