split_3x5_3 layout support (#9624)

* Add split_3x5_3 support to Minidox

* Add split_3x5_3 support to Miniaxe

* Add LAYOUT_mini to Centromere

This layout macro removes the need or KC_NO keycodes in the keymap.

* Add split_3x5_3 support to Centromere

* Add split_3x5_3 support to suihankey split

* Add LAYOUT_mini to centromere/info.json

* Add LAYOUT_mini to crkbd

* Add split_3x5_3 support to crkbd

* Change mini layout names

* Rename main layouts for split_3x6_3 keyboards

* Use split_3x5_3 macro for remaining keyboards

* Update relevant info.json files

* Fix suihankey/split/alpha macro

* Add layout aliases for suihankey

keyboards/minidox/rev1/info.json

@@ -5,7 +5,7 @@
   "width": 12,
   "height": 5.75,
   "layouts": {
-    "LAYOUT": {
+    "LAYOUT_split_3x5_3": {
       "key_count": 36,
       "layout": [{"x":0, "y":0.375}, {"x":1, "y":0.125}, {"x":2, "y":0}, {"x":3, "y":0.125}, {"x":4, "y":0.25}, {"x":7, "y":0.25}, {"x":8, "y":0.125}, {"x":9, "y":0}, {"x":10, "y":0.125}, {"x":11, "y":0.375}, {"x":0, "y":1.375}, {"x":1, "y":1.125}, {"x":2, "y":1}, {"x":3, "y":1.125}, {"x":4, "y":1.25}, {"x":7, "y":1.25}, {"x":8, "y":1.125}, {"x":9, "y":1}, {"x":10, "y":1.125}, {"x":11, "y":1.375}, {"x":0, "y":2.375}, {"x":1, "y":2.125}, {"x":2, "y":2}, {"x":3, "y":2.125}, {"x":4, "y":2.25}, {"x":7, "y":2.25}, {"x":8, "y":2.125}, {"x":9, "y":2}, {"x":10, "y":2.125}, {"x":11, "y":2.375}, {"x":2.5, "y":4.75}, {"x":3.5, "y":4.75}, {"x":4.5, "y":3.75, "h":2}, {"x":6.5, "y":3.75, "h":2}, {"x":7.5, "y":4.75}, {"x":8.5, "y":4.75}]
     }