Add module docstring for __init__.py

Author: tekktrik

adafruit_cursorcontrol/__init__.py

@@ -1,7 +1,14 @@
 # SPDX-FileCopyrightText: 2019 Brent Rubell for Adafruit Industries
 #
 # SPDX-License-Identifier: MIT
+"""
+`adafruit_cursorcontrol.cursorcontrol_cursormanager`
+================================================================================
+Mouse cursor for interaction with CircuitPython UI elements
 
+* Author(s): Brent Rubell
+
+"""
 __version__ = "0.0.0-auto.0"
 __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_CursorControl.git"