Move matrix config to info.json, part 5 (#20003)

Co-authored-by: Nick Brassel <nick@tzarc.org>

keyboards/switchplate/southpaw_fullsize/info.json

@@ -8,6 +8,11 @@
         "pid": "0x0017",
         "device_version": "0.0.1"
     },
+    "matrix_pins": {
+        "cols": ["A7", "C7", "C6", "C5", "F0", "F1", "F2", "F3", "F4", "F5", "F6", "F7", "A0", "A1", "A2", "A3", "A4", "A5", "A6", "E0", "D7", "D6"],
+        "rows": ["E1", "C0", "C1", "C2", "C3", "C4"]
+    },
+    "diode_direction": "COL2ROW",
     "backlight": {
         "pin": "B7"
     },