Fix documentation

[tekktrik]

1. Fix Cursor class docstring to include information about bmp parameter in cursorcontrol.py
2. Add typing to bmp parameter to cursor_bitmap setter method docstring in cursorcontrol.py
3. Add bmp parameter to generate_cursor() method docstring in cursorcontrol.py
4. Update cursor parameter type to Cursor in CursorManager class docstring in cursorcontrol_cursormanager.py
5. Remove event parameter from _store_button_states() method docstring in cursorcontrol_cursormanager.py
6. Update cursor parameter type to Cursor in DebouncedCursorManager class docstring in cursorcontrol_cursormanager.py

[FoamyGuy]

closed by #30