Support for windows: getting terminal width and height without using 'fcntl'

[hedyhli]

When running starcli on windows it throws the following error, because fcntl is not supported on windows:

Traceback (most recent call last):
  File "c:\program files\python38\lib\runpy.py", line 192, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\program files\python38\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Users\<username>\AppData\Roaming\Python\Python38\Scripts\starcli.exe\__main__.py", line 9, in <module>
  File "C:\Users\<username>\AppData\Roaming\Python\Python38\site-packages\starcli\__main__.py", line 39, in cli
    list_layout(repos)
  File "C:\Users\<username>\AppData\Roaming\Python\Python38\site-packages\starcli\layouts.py", line 18, in list_layout
    term_width, _ = terminal_size()
  File "C:\Users\<username>\AppData\Roaming\Python\Python38\site-packages\starcli\terminal_size.py", line 6, in terminal_size
    import fcntl, termios, struct
ModuleNotFoundError: No module named 'fcntl'

In order to support windows, we need an alternative way (or extra way if the os is windows) to fetch the terminal width and height to be used in list layout printing. In other words, finding a substitute to fcntl to fetch terminal size info.

[hedyhli]

closed by #33