Windows: fail if not recyclable

[Dobatymo]

Should fix #28

• Deletion can only be aborted by raising an exception. The reason for this is that pywin32 doesn't use the result of the callback functions as HR value. However since FOFX_EARLYFAILURE is used anyway, aborting using an exception should be fine. A unavoidable (?) log will be printed though.

pythoncom error: Unexpected exception in gateway method 'PreDeleteItem'

Traceback (most recent call last):
  File "...\Python38\lib\site-packages\win32com\server\policy.py", line 355, in _InvokeEx_
    return self._invokeex_(dispid, lcid, wFlags, args, kwargs, serviceProvider)
  File "...\Python38\lib\site-packages\win32com\server\policy.py", line 637, in _invokeex_
    return func(*args)
  File "...\send2trash\win\IFileOperationProgressSink.py", line 47, in PreDeleteItem
    raise E_Fail(f"File would be deleted permanently: {name}")
send2trash.win.IFileOperationProgressSink.E_Fail: File would be deleted permanently: ...\send2trash\tmp\0

later the operation will raise an "unknown error" in this case (which can be caught)

Traceback (most recent call last):
  File "...\send2trash\win\modern.py", line 65, in send2trash
    result = fileop.PerformOperations()
pywintypes.com_error: (-2147467259, 'unknown error', None, None)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "prog.py", line 19, in <module>
    send2trash(paths)
  File "...\send2trash\win\modern.py", line 77, in send2trash
    raise win_exception(hr, path)
OSError: [WinError -2147467259] unknown error: ...\\send2trash\\tmp\\0'

• Error handling was slightly improved. Previously the exception would always contain the filename of the last item in the list, not the file for which the call actually failed. Also some unusual errors (at the moment only COPYENGINE_E_SHARING_VIOLATION_SRC) are converted to standard exceptions (in this case a PermissionError)

I tested on Windows 7 and Windows 11.