Tech debt: Use Link headers to paginate rather than manual pagination

Current Project API pagination is brittle due to the current manual method of pagination within the ProjectsService. This was done as an acceptable stopgap to go live, and a better fix that makes use of Link Headers should be used.

On the initial investigation, there was no found way to easily extend the RESTeasy API builder model. If this model can be extended, then adding a post-process to the responses to attach Link headers to the response output can be used to more sustainably iterate over the data. If there is no way to extend this model, then a concrete implementation will need to be created for the Projects REST API over the generated implementation.