Migrate build target markers to keyboard.json - R (#23542)

keyboards/recompile_keys/nomu30/rev1/keyboard.json

@@ -0,0 +1,15 @@
+{
+    "features": {
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": false,
+        "nkro": false
+    },
+    "matrix_pins": {
+        "cols": ["C6", "D7", "E6", "B4", "F4", "F5", "F6", "F7", "B1", "B3", "B2", "B6"],
+        "rows": ["D1", "D0", "D4"]
+    },
+    "diode_direction": "COL2ROW",
+    "processor": "atmega32u4",
+    "bootloader": "caterina"
+}