Main window focus

[Foundit3923]

• closes Add easy way to set the game to be in focus #6
• adds pywinctl to dependencies in .toml
• adds imports for win32gui, win32process, _internal, and ctypes
• adds a function to focus main window with set_main_window_focus()

[Foundit3923]

I think this is ready.

• closes Add easy way to set the game to be in focus #6
• adds pywinctl to dependencies in .toml
• gets main window handle on startup
• adds imports for pywinctl, win32gui, win32process, and _internal
• adds a function to focus main window with set_main_window_focus()
• adds a function to evaluate if the main window is the foreground with is_main_window_foreground()
• adds a function to retrieve the main window as a Window object with get_main_window

[monkeyman192]

logging is imported twice

[monkeyman192]

these changes are not required. If you want to have on_enter=True, then specify it in the STRING variable decorator as an extra arg and it will come through to here (cf. lines 257 & 258)