Configurator Support(info.json) for 1up Keyboards Sweet16 (#2570)

* Configurator Support

- Add info.json to support existing layouts
- Add comment in sweet16.h to remind people to change info.json if
  the layout changes.

* Fix dlaroe's keymap

keyboards/sweet16/sweet16.h

@@ -3,6 +3,8 @@
 
 #include "quantum.h"
 
+// Any changes to the layout names and/or definitions must also be made to info.json
+
 #define LAYOUT_ortho_4x4( \
     K00, K01, K02, K03, \
     K10, K11, K12, K13, \
@@ -22,9 +24,9 @@
        K31,   K32      \
 ) { \
     { K00,   K01,   K02,   K03 }, \
-    { K10,   K11,   K12,   K13 }, \
+    { K10,   K11,   K12,   KC_NO }, \
     { K20,   K21,   K22,   K23 }, \
-    { K30,   K31,   K32,   K33 }  \
+    { KC_NO, K31,   K32,   KC_NO }  \
 }
 
-#endif
+#endif