Move ckeys workshop to its own directory (#2928)

* move obelus and nakey to ckeys directory

* delete the originals

* short readme about ckeys

* edit readmes to reflect new changes

* add build guide info..and here's me trying to retrigger the build job

keyboards/ckeys/obelus/obelus.h

@@ -0,0 +1,23 @@
+#ifndef OBELUS_H
+#define OBELUS_H
+
+#include "quantum.h"
+
+// This a shortcut to help you visually see your layout.
+// The following is an example using the Planck MIT layout
+// The first section contains all of the arguements
+// The second converts the arguments into a two-dimensional array
+#define KEYMAP( \
+    k00, k01, k02, k03, \
+    k10, k11, k12, k13, \
+    k20, k21, k22, k23, \
+    k30, k31, k32, k33 \
+) \
+{ \
+    { k00, k01, k02, k03 }, \
+    { k10, k11, k12, k13 }, \
+    { k20, k21, k22, k23 }, \
+    { k30, k31, k32, k33 } \
+}
+
+#endif