Formatting changes to Alpha readme.md (#2781)

* alpha with firmware added to list of keyboards, ready to push

* revised according to drashna's fixes

* keymap -> layout?

* fixed macro and improved layout issuesOC

* Update rules.mk

* Update alpha.h

* Update and rename keyboards/alpha/layouts/default/28_alpha/keymap.c to keyboards/alpha/keymaps/default/keymap.c

* alpha/readme.md added according to qmk templateOC

* resolved a careless merge conflict

* bugfix

* Fixed /keyboards/alpha/readme.md formatting issues

keyboards/alpha/readme.md

@@ -1,10 +1,13 @@
 # Alpha
 
-![Alpha](https://imgur.com/a/TouJ5rH)
+![Alpha](https://i.imgur.com/J6EJ30N.jpg)
 
 A 28-key, semi-ortho keyboard designed by PyroL!
+
 Keyboard Maintainer: [PyroL](https://www.github.com/PyrooL)
+
 Hardware Supported: Alpha PCB, Pro Micro
+
 Hardware Availability: on a group-buy basis for now. Pro Micros can be found on Ali or from the official Sparkfun website.
 
 Make example for Alpha (after setting up your build environment):