[Keyboard] boardsource/3x4 data driven (#17628)

* initial

* change to development board

* replaced KC_TRNS & use rules.mk template

keyboards/boardsource/3x4/info.json

@@ -1,27 +1,40 @@
 {
-    "keyboard_name": "boardsource 4x3",
-    "url": "https://boardsource.xyz",
-    "maintainer": "boardsource",
-    "layouts": {
-
-        "LAYOUT": {
-
-            "layout": [
-                { "label": "K01", "x": 0, "y": 0 },
-                { "label": "K02", "x": 1, "y": 0 },
-                { "label": "K03", "x": 2, "y": 0 },
-                { "label": "K04", "x": 3, "y": 0 },
-
-                { "label": "K05", "x": 0, "y": 1 },
-                { "label": "K06", "x": 1, "y": 1 },
-                { "label": "K07", "x": 2, "y": 1 },
-                { "label": "K08", "x": 3, "y": 1 },
-
-                { "label": "K09", "x": 0, "y": 2 },
-                { "label": "K10", "x": 1, "y": 2 },
-                { "label": "K11", "x": 2, "y": 2 },
-                { "label": "K12", "x": 3, "y": 2 }
-            ]
-        }
+  "manufacturer": "Boardsource",
+  "keyboard_name": "3x4",
+  "maintainer": "waffle87",
+  "development_board": "promicro",
+  "diode_direction": "COL2ROW",
+  "features": {
+    "bootmagic": true,
+    "extrakey": true,
+    "mousekey": true
+  },
+  "matrix_pins": {
+    "cols": ["B6", "B2", "B3", "B1"],
+    "rows": ["F7", "F6", "F5"]
+  },
+  "url": "https://boardsource.xyz/store/5ecc2008eee64242946c98c1",
+  "usb": {
+    "device_version": "1.0.0",
+    "pid": "0x0304",
+    "vid": "0x4273"
+  },
+  "layouts": {
+    "LAYOUT": {
+      "layout": [
+        { "matrix": [0, 0], "x": 0, "y": 0 },
+        { "matrix": [0, 1], "x": 1, "y": 0 },
+        { "matrix": [0, 2], "x": 2, "y": 0 },
+        { "matrix": [0, 3], "x": 3, "y": 0 },
+        { "matrix": [1, 0], "x": 0, "y": 1 },
+        { "matrix": [1, 1], "x": 1, "y": 1 },
+        { "matrix": [1, 2], "x": 2, "y": 1 },
+        { "matrix": [1, 3], "x": 3, "y": 1 },
+        { "matrix": [2, 0], "x": 0, "y": 2 },
+        { "matrix": [2, 1], "x": 1, "y": 2 },
+        { "matrix": [2, 2], "x": 2, "y": 2 },
+        { "matrix": [2, 3], "x": 3, "y": 2 }
+      ]
     }
+  }
 }