feat: New REST gateway to create and receive full submission

...n/src/main/java/unipotsdam/gf/interfaces/ISubmission.java

...f/modules/submission/controller/SubmissionController.java

...nipotsdam/gf/modules/submission/model/FullSubmission.java

...f/modules/submission/model/FullSubmissionPostRequest.java

...tsdam/gf/modules/submission/model/SubmissionResponse.java

...potsdam/gf/modules/submission/view/SubmissionService.java

gemeinsamforschen/src/scripts/dbschema/fltrail.sql