New DZ60 layout (#2744)

* initial commit

* - Move layout to readme
- Finish first (0) layer

* remove cruft

* fix ASCII keymap in readme

* fix ASCII keymap in readme #2

* fix ASCII keymap in readme

* rename layers

* use 2 shift layout

* rename layers, populate additional layers

* final layout (TM)

* fix RGB saturation increase position

keyboards/dz60/keymaps/weeheavy/README.md

@@ -0,0 +1,61 @@
+![DZ60 split spacebar layout image](https://i.imgur.com/EFF7pBN.png)
+
+# weeheavy's DZ60 split spacebar layout
+
+* 2u left shift
+* arrow cluster
+* split spacebar with a center key
+
+## Layouts
+
+The base layout is ANSI QWERTY.
+
+Key sizes (ASCII keyboards below match this scale):
+
+    1u    = 4 chars  = |  |
+    1.25u = 5 chars  = |   |
+    1.5u  = 6 chars  = |    |
+    1.75u = 7 chars  = |     |
+    2u    = 8 chars  = |      |
+    2.25u = 9 chars  = |       |
+    2.75u = 11 chars = |         |
+    6.25u = 25 chars = |                       |
+
+### Layer 0: Base layout
+
+Specialities:
+
+* Arrow cluster
+* FN1: access to layer 1
+* F2: access to layer 2
+
+```
+,----------------------------------------------------------.
+|Es||1 ||2 ||3 ||4 ||5 ||6 ||7 ||8 ||9 ||0 ||- ||= || Bksp |
+|----------------------------------------------------------+
+|Tab ||Q ||W ||E ||R ||T ||Y ||U ||I ||O ||P ||[ ||] || \  |
+|----------------------------------------------------------+
+|Caps ||A ||S ||D ||F ||G ||H ||J ||K ||L ||; ||' || Enter |
+|----------------------------------------------------------+
+|Shift ||Z ||X ||C ||V ||B ||N ||M ||, ||. ||/ ||Sf||↑ ||Dl|
+|----------------------------------------------------------+
+|Ctl||Win||Alt|| Space ||FN1||  Space  ||Al||F2||← ||↓ ||→ |
+`----------------------------------------------------------'
+```
+
+### Layer 1: Utility
+
+Specialities:
+
+* F1-F12 keys when holding FN1
+* Movement cluster on the right hand side
+* Multimedia cluster on the bottom right
+* RGB config on the left hand side
+
+### Layer 2: Config and setup
+
+Specialities:
+
+* Reset key on ESC and backslash location
+* Additional "B" key (a learning from my mistakes)
+