Keyboard: add info.json for qmk configurator (#4063)

keyboards/namecard2x4/info.json

@@ -0,0 +1,13 @@
+{
+    "keyboard_name": "namecard2x4", 
+    "url": "https://skyhigh-works.hatenablog.com/", 
+    "maintainer": "takashiski", 
+    "bootloader": "atmel-dfu", 
+    "width": 4, 
+    "height": 2, 
+    "layouts": {
+        "LAYOUT": {
+            "layout": [{"label":"1", "x":0, "y":0}, {"label":"2", "x":1, "y":0}, {"label":"3", "x":2, "y":0}, {"label":"4", "x":3, "y":0}, {"label":"5", "x":0, "y":1}, {"label":"6", "x":1, "y":1}, {"label":"7", "x":2, "y":1}, {"label":"8", "x":3, "y":1}]
+        }
+    }
+}