setup.py fix for windows

[Thirulogeswaren]

This fixes the setup.py invoked when installing crosstl manually -> py -m pip install . especially on windows machines and also resolves the same error when installing crosstl using pip:

Traceback (most recent call last):
  File "C:\Files\repos\PythonGround\crosstl\setup.py", line 24, in <module>
    long_description=open("README.md").read(),
                     ^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\asdas\AppData\Local\Programs\Python\Python312\Lib\encodings\cp1252.py", line 23, in decode
    return codecs.charmap_decode(input,self.errors,decoding_table)[0]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
UnicodeDecodeError: 'charmap' codec can't decode byte 0x8d in position 3319: character maps to <undefined>

manual installation is tested by creating virtual environment using venv and then by running pip install . which triggers the setup.py script and installs the crosstl package

same error when installed using pip:

Collecting crosstl
  Using cached crosstl-0.0.1.3.tar.gz (44 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [10 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "C:\Users\asdas\AppData\Local\Temp\pip-install-4cvozngb\crosstl_757360f28e2d45ce80dbf835065ec704\setup.py", line 24, in <module>
          long_description=open("README.md").read(),
                           ^^^^^^^^^^^^^^^^^^^^^^^^
        File "C:\Users\asdas\AppData\Local\Programs\Python\Python312\Lib\encodings\cp1252.py", line 23, in decode
          return codecs.charmap_decode(input,self.errors,decoding_table)[0]
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      UnicodeDecodeError: 'charmap' codec can't decode byte 0x8d in position 3246: character maps to <undefined>
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.