mk3 projectiontype is not validated upon initialization

[veenstrajelmer]

Describe the bug
There is not feedback on an incorrect projection when initializing a mk instance. Also, there is an unclear error upon get_projection.

To Reproduce

import meshkernel
mk2 = meshkernel.MeshKernel(projection='spherical123')
mk2.get_projection()

Raises ValueError:

Traceback (most recent call last):

  Cell In[12], line 2
    mk2.get_projection()

  File ~\Anaconda3\envs\dfm_tools_py311\Lib\site-packages\meshkernel\meshkernel.py:1508 in get_projection
    return ProjectionType(projection.value)

  File ~\Anaconda3\envs\dfm_tools_py311\Lib\enum.py:712 in __call__
    return cls.__new__(cls, value)

  File ~\Anaconda3\envs\dfm_tools_py311\Lib\enum.py:1128 in __new__
    raise ve_exc

ValueError: 1613394736 is not a valid ProjectionType

Also, when aquiring the projectiontype, there is no useful feedback about the available options:

meshkernel.ProjectionType('cartesian')
Traceback (most recent call last):

  Cell In[17], line 1
    meshkernel.ProjectionType('cartesian')

  File ~\Anaconda3\envs\dfm_tools_py311\Lib\enum.py:712 in __call__
    return cls.__new__(cls, value)

  File ~\Anaconda3\envs\dfm_tools_py311\Lib\enum.py:1128 in __new__
    raise ve_exc

ValueError: 'cartesian' is not a valid ProjectionType

Expected behavior
Feedback upon initialization about the options. Strings should be parsed to enum automatically.

Version info (please complete the following information):

• OS: [e.g. Windows]
• Version 3.0.0

[ahmad-el-sayed]

MeshKernel constructor is not parametrised by a string:

class MeshKernel:
    """This class is the entry point for interacting with the MeshKernel library"""

    def __init__(self, projection: ProjectionType = ProjectionType.CARTESIAN):
        """Constructor of MeshKernel

        Args:
            projection (ProjectionType, optional): The projection type. Default is `ProjectionType.CARTESIAN`.

        Raises:
            OSError: This gets raised in case MeshKernel is used within an unsupported OS.
        """

where

@unique
class ProjectionType(IntEnum):
    """The projection types."""

    CARTESIAN = 0
    SPHERICAL = 1
    SPHERICALACCURATE = 2

The named param projection should be set to the ProjectionType enum.