Migrate features and LTO from rules.mk to data driven (#23307)

keyboards/smoll/lefty/info.json

@@ -3,6 +3,18 @@
     "manufacturer": "SmollChungus",
     "url": "https://github.com/smollchungus",
     "maintainer": "smollchungus",
+    "build": {
+        "lto": true
+    },
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "extrakey": true,
+        "mousekey": false,
+        "nkro": false,
+        "oled": true
+    },
     "usb": {
         "vid": "0x5363",
         "pid": "0x0001",

keyboards/smoll/lefty/rules.mk

@@ -1,17 +1 @@
-# 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 = no        # Enable keyboard RGB underglow
-AUDIO_ENABLE = no           # Audio output
-LTO_ENABLE = yes
-
-OLED_ENABLE = yes
-
 DEFAULT_FOLDER = smoll/lefty/rev2