Backend work to transfer site to project from site settings

[DerekCaelin]

Initiate the work on the backend that will allow the user to transfer a site into a project. See parent task for details.

References

• Permissions source of truth

Related Issues

• Transferring sites between projects terraso-product#30

Acceptance Criteria

• As the manager of an unaffiliated site, I want to be able to transfer that site to a project where I am a manager or a contributor, so I can collaborate with others on data collection for a site