Doc update + get_project_by_name and pretty print

[FedericoNegri]

Multiple doc updates plus a few code changes:

1. Project query: get_project now only queries projects by id consistently with the REST API. I introduced a separate method to query by name

   def get_project_by_name(self, name, last_created=True) -> Union[Project, List[Project]]:
        """
        Query projects by name. If no projects are found, an empty list is returned.
            In case of multiple projects with same name:
             - If `last_created = True`, the last created project is returned
             - If `last_created = False`, the full list of projects with given name is returned
        """

2. JSON style print of resource objects. This PR includes a fix to make sure load_only fields are printed out. In general, printing a resource now looks like this:

   Old (DCS Python client style):

   In [2]: print(project)
   Project(
   id='02qpDM5mhNayzVMnCnJUwr',
   name='Mapdl Motorbike Frame',
   active=True,
   priority=1,
   creation_time=datetime.datetime(2022, 8, 30, 5, 41, 18, 97881, tzinfo=datetime.timezone(datetime.timedelta(0), '+0000')),
   modification_time=datetime.datetime(2022, 8, 30, 5, 41, 22, 426513, tzinfo=datetime.timezone(datetime.timedelta(0), '+0000')),
   file_storages=<marshmallow.missing>,
   statistics={'eval_status': {'aborted': 0, 'evaluated': 0, 'failed': 0, 'inactive': 0, 'pending': 50, 'prolog': 0, 'running': 0, 'timeout': 0}, 'files_size': 14444, 'num_jobs': 50}
   )

   New:

   In [2]: print(project)
   {
     "id": "02qpDM5mhNayzVMnCnJUwr",
     "name": "Mapdl Motorbike Frame",
     "active": true,
     "priority": 1,
     "creation_time": "2022-08-30T05:41:18.097881+00:00",    
     "modification_time": "2022-08-30T05:41:22.426513+00:00",
     "statistics": {
       "eval_status": {
         "aborted": 0,
         "evaluated": 0,
         "failed": 0,
         "inactive": 0,
         "pending": 50,
         "prolog": 0,
         "running": 0,
         "timeout": 0
       },
       "files_size": 14444,
       "num_jobs": 50
     }
   }

[FedericoNegri]

@ojkoenig Please have a look at these changes. Trying to improve the querying projects by name...

[ojkoenig]

Thought about more standard alternatives for your get_project_by_name(...) but did not really succeed to come up with something better, and I understand your proposal to keep convenience and access latest project of a given name easy.