Migrate features and LTO from rules.mk to data driven (#23302)

keyboards/feker/ik75/keyboard.json

@@ -57,6 +57,20 @@
         "driver": "is31fl3733",
         "max_brightness": 200
     },
+    "build": {
+        "lto": true
+    },
+    "features": {
+        "bootmagic": true,
+        "command": false,
+        "console": false,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": false,
+        "nkro": true,
+        "rgb_matrix": true,
+        "space_cadet": false
+    },
     "matrix_pins": {
         "cols": ["E6", "B0", "B1", "B2", "B3", "B7", "D2", "D3", "D5", "D4", "D6", "D7", "B4", "B5", "B6", "E2"],
         "rows": ["F7", "F6", "F5", "F4", "F1", "F0"]

keyboards/feker/ik75/rules.mk

@@ -1,22 +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 = yes           # Enable N-Key Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
-AUDIO_ENABLE = no           # Audio output
-
-# Additional thing to reduce compiled size
-LTO_ENABLE = yes
-SPACE_CADET_ENABLE = no
-
-# RGB Matrix enabled
-RGB_MATRIX_ENABLE = yes
-
-# Encoder enabled
-ENCODER_ENABLE = yes