BDN9 Configurator support (#4978)

keyboards/bdn9/info.json

@@ -0,0 +1,22 @@
+{
+  "keyboard_name": "Keeb.io BDN9",
+  "url": "",
+  "maintainer": "nooges",
+  "width": 3,
+  "height": 3,
+  "layouts": {
+    "LAYOUT": {
+      "layout": [
+        {"x":0, "y":0},
+        {"x":1, "y":0},
+        {"x":2, "y":0},
+        {"x":0, "y":1},
+        {"x":1, "y":1},
+        {"x":2, "y":1},
+        {"x":0, "y":2},
+        {"x":1, "y":2},
+        {"x":2, "y":2}
+      ]
+    }
+  }
+}