Migrate features from rules.mk to data driven - ST (#23286)

keyboards/swiftrax/retropad/keyboard.json

@@ -8,6 +8,16 @@
         "pid": "0xEB0C",
         "device_version": "0.0.1"
     },
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": false,
+        "nkro": false,
+        "rgblight": true
+    },
     "matrix_pins": {
         "cols": ["B4", "D2"],
         "rows": ["C7", "C6", "B5"]

keyboards/swiftrax/retropad/rules.mk

@@ -1,13 +0,0 @@
-# Build Options
-#   change yes to no to disable
-#
-BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
-MOUSEKEY_ENABLE = no        # Mouse keys
-EXTRAKEY_ENABLE = yes       # Audio control and System control
-CONSOLE_ENABLE = no         # Console for debug
-COMMAND_ENABLE = no         # Commands for debug and configuration
-NKRO_ENABLE = no            # Enable N-Key Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
-AUDIO_ENABLE = no           # Audio output
-ENCODER_ENABLE = yes