Mechlovin Hannah60RGB touch-up (#14646)

* use XXX for KC_NO in rev1.h

* add matrix diagram to rev1.h

* remove reference to KBFirmware JSON Parser from rev1.h

* use XXX for KC_NO in rev2.h

* add matrix diagram to rev2.h

* add LAYOUT_60_ansi and LAYOUT_60_iso

* enable Community Layout support

* update info.json metadata

- specify keyboard revision in keyboard_name
- use GitHub username in maintainer field

* remove reference to KBFirmware JSON Parser from main rules.mk

keyboards/mechlovin/hannah60rgb/rev1/info.json

@@ -1,7 +1,7 @@
 {
-    "keyboard_name": "hannah60rgb",
+    "keyboard_name": "hannah60rgb rev1",
     "url": "",
-    "maintainer": "Team Mechlovin'",
+    "maintainer": "mechlovin",
     "layouts": {
         "LAYOUT_all": {
             "layout": [