Add keyboard PistachioMacroPad (#10980)

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/pistachio_mp/info.json

@@ -0,0 +1,30 @@
+{
+    "keyboard_name": "pistachio_mp", 
+    "url": "", 
+    "maintainer": "rate", 
+    "width": 4, 
+    "height": 6.5, 
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+            {"label":"Encoder", "x":3, "y":0},
+            {"label":"Num Lock", "x":0, "y":1.5},
+            {"label":"/", "x":1, "y":1.5},
+            {"label":"*", "x":2, "y":1.5},
+            {"label":"-", "x":3, "y":1.5},
+            {"label":"7", "x":0, "y":2.5},
+            {"label":"8", "x":1, "y":2.5},
+            {"label":"9", "x":2, "y":2.5},
+            {"label":"+", "x":3, "y":2.5, "h":2},
+            {"label":"4", "x":0, "y":3.5},
+            {"label":"5", "x":1, "y":3.5},
+            {"label":"6", "x":2, "y":3.5},
+            {"label":"1", "x":0, "y":4.5},
+            {"label":"2", "x":1, "y":4.5},
+            {"label":"3", "x":2, "y":4.5},
+            {"label":"Enter", "x":3, "y":4.5, "h":2},
+            {"label":"0", "x":0, "y":5.5, "w":2},
+            {"label":".", "x":2, "y":5.5}]
+        }
+    }
+}