[Keyboard] add shk9 macropad (#11505)

* added shk9 macropad

* updated readme

* removed json file

* updated config

* removed commented config

* fixed website address

* added bootloader mode info to readme

* remove midi enable rule

* fixed comment

* fixed default keymap

* changed layout to ortho

* fixed typo

* fixed broken layout

* pr changes

* added keymap spacing

keyboards/shk9/info.json

@@ -0,0 +1,23 @@
+{
+    "keyboard_name": "SHK9",
+    "url": "http://superhuman.website",
+    "maintainer": "Sam Hudson",
+    "width": 3,
+    "height": 3,
+    "lighting": "none",
+    "layouts": {
+        "LAYOUT_ortho_3x3": {
+          "layout": [
+            {"label":"7", "x":0, "y":0},
+            {"label":"8", "x":1, "y":0},
+            {"label":"9", "x":2, "y":0},
+            {"label":"4", "x":0, "y":1},
+            {"label":"5", "x":1, "y":1},
+            {"label":"6", "x":2, "y":1},
+            {"label":"1", "x":0, "y":2},
+            {"label":"2", "x":1, "y":2},
+            {"label":"3", "x":2, "y":2}
+          ]
+        }
+    }
+}