Initial ClientHttpException class

Create HTTP status enum

Add some tests

Add javadoc

Refactor HttpStatus

Add specialized builder to ProblemDetails

Add missing header

Make problem details parsing more resilient

Add tests for problem details parsing

The tests are in the solid-client module, because it will need the
additional json service anyways in the test dependencies for testing the
rest of this feature, and putting these tests in the api module creates
a circular dependency.

License header

the JSON was invalid, causing the intended code path not to be used.

The exception are now built taking a ProblemDetails in.

Use HttpStatus from API module as reference

Lint

That is required by jsonb