Add Rorschach keyboard (#3532)

* Add Rorschach keyboard

* Add info.json

* Replace header guards with pragma once

keyboards/rorschach/readme.md

@@ -0,0 +1,20 @@
+Rorschach
+=========
+
+A split ortholinear 4x6 keyboard with 2 additional thumb keys and sold by Keebio. [More info at Keebio](https://keeb.io).
+
+Keyboard Maintainer: [Bakingpy/nooges](https://github.com/nooges)  
+Hardware Supported: Pro Micro  
+Hardware Availability: [Keebio](https://keeb.io)  
+
+Make example for this keyboard (after setting up your build environment):
+
+    make rorschach/rev1:default
+
+Example of flashing this keyboard:
+
+    make rorschach/rev1:default:avrdude
+
+See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.
+
+A build guide for this keyboard can be found here: [Iris Build Guide](https://docs.keeb.io/iris-build-guide.html)