Add console_scripts to create .exe file during installation on Windows

This makes it possible to run the fdroid on Windows from the command prompt (cmd.exe). It will create an fdroid.exe file inside PythonDir\Scripts and a regular Python shell script on Linux that looks like this:

#!/home/user/Projects/fdroid/fdroidserver-env/bin/python3
# EASY-INSTALL-ENTRY-SCRIPT: 'fdroidserver','console_scripts','fdroid'
import re
import sys

# for compatibility with easy_install; see #2198
__requires__ = 'fdroidserver'

try:
    from importlib.metadata import distribution
except ImportError:
    try:
        from importlib_metadata import distribution
    except ImportError:
        from pkg_resources import load_entry_point


def importlib_load_entry_point(spec, group, name):
    dist_name, _, _ = spec.partition('==')
    matches = (
        entry_point
        for entry_point in distribution(dist_name).entry_points
        if entry_point.group == group and entry_point.name == name
    )
    return next(matches).load()


globals().setdefault('load_entry_point', importlib_load_entry_point)


if __name__ == '__main__':
    sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
    sys.exit(load_entry_point('fdroidserver', 'console_scripts', 'fdroid')())