Creates a layouts/ folder for keymaps shared between keyboards (#1609)

* include variables and .h files as pp directives

* start layout compilation

* split ergodoxes up

* don't compile all layouts for everything

* might seg fault

* reset layouts variable

* actually reset layouts

* include rules.mk instead

* remove includes from rules.mk

* update variable setting

* load visualizer from path

* adds some more examples

* adds more layouts

* more boards added

* more boards added

* adds documentation for layouts

* use lowercase names for LAYOUT_

* add layout.json files for each layout

* add community folder, default keymaps for layouts

* touch-up default layouts

* touch-up layouts, some keyboard rules.mk

* update documentation for layouts

* fix up serial/i2c switches

keyboards/amj60/amj60.h

@@ -63,6 +63,8 @@
     {k40, k41, k42, XXX, XXX, k45, XXX, XXX, XXX, XXX, k4a, k4b, k4c, k4d}  \
 }
 
+#define LAYOUT_60_ansi KEYMAP_ANSI
+
 /* AMJ60 HHKB matrix layout
    * ,------------------------------------------------------------.
    * | 00 |01| 02| 03| 04| 05| 06| 07| 08| 09| 0a| 0b| 0c| 0d| 49 |
@@ -119,6 +121,7 @@
     {k30, k31, k32, k33, k34, k35, k36, k37, k38, k39, k3a, k3b, k3c, XXX}, \
     {k40, k41, k42, XXX, XXX, k45, XXX, XXX, XXX, XXX, k4a, k4b, k4c, k4d}  \
 }
+
 /* ISO w/ split right shift key matrix layout
    * ,-----------------------------------------------------------.
    * | 00 |01| 02| 03| 04| 05| 06| 07| 08| 09| 0a| 0b| 0c| 0d    |

keyboards/amj60/rules.mk

@@ -64,3 +64,5 @@ MIDI_ENABLE      = no  # MIDI controls
 AUDIO_ENABLE     = no
 UNICODE_ENABLE   = no  # Unicode
 BLUETOOTH_ENABLE = no  # Enable Bluetooth with the Adafruit EZ-Key HID
+
+LAYOUTS = 60_ansi