Use Fhir Bundle type transaction for uploading the local changes to the server.

[aditya-07]

Is your feature request related to a problem? Please describe.
Multiple Resource changes can be uploaded to the server in a single request using Bundle compared to Multiple individual requests for each one.

Describe the solution you'd like
Use Bundle 'transaction' to upload the resources as Bundle 'batch' can't have resources with interdependencies. As with Http PUT, for creating resources, the resource Id doesn't changes. It simplifies the engine implementation to a greater extent, so use Http.PUT for now.
Continue to use Http.PATCH for updating resources as it is done currently.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.

Would you like to work on the issue?
Yes