Create README for Crickit micro:bit Robot

Added README for Adafruit Crickit micro:bit Robot.

Author: TheKitty

Crickits/Crickit_MicroBit_Robot/README.md

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+## Adafruit Crickit micro:bit Robot
+
+This is a resorce folder for a micro:bit robot using the Crickit platform from Adafruit.
+
+Link to the full guide.
+https://learn.adafruit.com/microbit-crickit-robot
+
+Support open source hardware and software by buying parts at [adafruit.com](https://www.adafruit.com/).