Add basic endpoints and Swagger

Add basic endpoints and Swagger

Initial commit: basic FastAPI app

update: flutter_ci.yml

update: README.md

create: providers_test.dart

create: local_storage_test.dart

update: FINAL_SPRINT.md

create: FINAL_SPRINT.md

update: README.md

update: README.md

create: form_validators.dart

delete: validators

create: validators

create: new_file

create: loading_indicator.dart