Support URL as input path when constructing models

[veenstrajelmer]

NOTE: this issue requires futher refinement

Describe the request
When using a url as an input path, this error is raised "OSError: [WinError 123] The filename, directory name, or volume label syntax is incorrect: 'C:\\DATA\\dfm_tools\\tests\\examples\\https:\\raw.githubusercontent.com\\Deltares\\HYDROLIB-core\\main\\tests\\data\\input\\dflowfm_individual_files\\with_optional_sections.mdu'"

To Reproduce

import hydrolib.core.dflowfm as hcdfm
file_mdu = 'https://raw.githubusercontent.com/Deltares/HYDROLIB-core/main/tests/data/input/dflowfm_individual_files/with_optional_sections.mdu'
fm = hcdfm.FMModel(file_mdu)

Expected behavior
Reading file without issues

NOTE:
This in fact means support for URLs when loading a model. We need to think a bit further before implementing this:

• what happens when calling fm.save() subsequently.
• Upon loading, do we automatically set recurse=False, or not?
• If we get a file from URL, that itself contains absolute file path references, what happens?
• double check (in)compatibility with our current FilePathResolver
• more...?

Version info (please complete the following information):

• Version main branch