Add info.json files for all default layouts (#7425)

* Add info.json files for all default layouts

* Update layouts/default/60_hhkb/layout.json

* Fix layout.json spacing and info.json dimensions

layouts/default/numpad_4x4/info.json

@@ -0,0 +1,29 @@
+{
+    "keyboard_name": "4x4 number pad layout",
+    "url": "",
+    "maintainer": "qmk",
+    "width": 4,
+    "height": 4,
+    "layouts": {
+        "LAYOUT_numpad_4x4": {
+            "layout": [
+                {"x":0, "y":0},
+                {"x":1, "y":0},
+                {"x":2, "y":0},
+                {"x":3, "y":0, "h":2},
+
+                {"x":0, "y":1},
+                {"x":1, "y":1},
+                {"x":2, "y":1},
+
+                {"x":0, "y":2},
+                {"x":1, "y":2},
+                {"x":2, "y":2},
+                {"x":3, "y":2, "h":2},
+
+                {"x":0, "y":3, "w":2},
+                {"x":2, "y":3}
+            ]
+        }
+    }
+}

layouts/default/numpad_4x4/layout.json

@@ -1,4 +1,4 @@
-["","","",{h:2},""],
+[{a:7},"","","",{h:2},""],
 ["","",""],
 ["","","",{h:2},""],
 [{w:2},"",""]