Add explicit range information to all classes & slots

[dalito]

This PR removes default_range: string and adds explicit add range information to all classes/slots.

This also marks still missing class_uri, slot_uri, meaning as todos (related to #19).

Closes #31

[dalito]

The action failure is due to problems of Python <3.11 with datetime.fromisoformat("2024-02-19T00:00:00Z"). This is a known issue linkml/linkml#629

Also LinkML runtime has a bug preventing dumping json (specifically to serialise datetime). Running py examples\example_p1_pydantic.py gives this traceback:

Traceback (most recent call last):
  File "C:\Users\dlinke\MyProg_local\gh-nfdi4cat\pid4cat-model\examples\example_p1_pydantic.py", line 83, in <module>
    print(json_dumper.dumps(p1))
          ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\dlinke\MyProg_local\gh-nfdi4cat\pid4cat-model\.venv\Lib\site-packages\linkml_runtime\dumpers\json_dumper.py", line 64, in dumps
    return json.dumps(as_json_object(element, contexts, inject_type=inject_type),
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\dev\Python312\Lib\json\__init__.py", line 238, in dumps
    **kw).encode(obj)
          ^^^^^^^^^^^
  File "C:\dev\Python312\Lib\json\encoder.py", line 202, in encode
    chunks = list(chunks)
             ^^^^^^^^^^^^
  File "C:\dev\Python312\Lib\json\encoder.py", line 432, in _iterencode
    yield from _iterencode_dict(o, _current_indent_level)
  File "C:\dev\Python312\Lib\json\encoder.py", line 406, in _iterencode_dict
    yield from chunks
  File "C:\dev\Python312\Lib\json\encoder.py", line 326, in _iterencode_list
    yield from chunks
  File "C:\dev\Python312\Lib\json\encoder.py", line 406, in _iterencode_dict
    yield from chunks
  File "C:\dev\Python312\Lib\json\encoder.py", line 439, in _iterencode
    o = _default(o)
        ^^^^^^^^^^^
  File "C:\Users\dlinke\MyProg_local\gh-nfdi4cat\pid4cat-model\.venv\Lib\site-packages\linkml_runtime\dumpers\json_dumper.py", line 61, in default
    return json.JSONDecoder().decode(o)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\dev\Python312\Lib\json\decoder.py", line 338, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
                                      ^^^^^^^^
TypeError: expected string or bytes-like object, got 'datetime.datetime'

The example that uses the Python dataclasses works without errors py examples\example_p1_dataclasses.py.

I'll create an issue in the LinkML repo but merge this PR nevertheless.