[Keyboard] Dumbpad VIA support added (#13512)

Co-authored-by: Ryan <fauxpark@gmail.com>

keyboards/dumbpad/info.json

@@ -0,0 +1,18 @@
+{
+    "keyboard_name": "dumbpad",
+    "keyboard_folder": "dumbpad",
+    "url": "https://www.github.com/imchipwood/dumbpad",
+    "maintainer": "imchipwood",
+    "width": 5,
+    "height": 4,
+    "layouts": {
+        "LAYOUT": {
+            "layout": [
+                                {"x":1, "y":0}, {"x":2, "y":0}, {"x":3, "y":0}, {"x":4, "y":0},
+                                {"x":1, "y":1}, {"x":2, "y":1}, {"x":3, "y":1}, {"x":4, "y":1},
+                                {"x":1, "y":2}, {"x":2, "y":2}, {"x":3, "y":2}, {"x":4, "y":2},
+                {"x":0, "y":3}, {"x":1, "y":3}, {"x":2, "y":3}, {"x":3, "y":3}, {"x":4, "y":3}
+            ]
+        }
+    }
+}