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

keyboards/rmi_kb/chevron/keyboard.json

@@ -8,6 +8,13 @@
         "pid": "0xC4EE",
         "device_version": "0.1.2"
     },
+    "features": {
+        "bootmagic": true,
+        "encoder": true,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": false
+    },
     "matrix_pins": {
         "cols": ["A5", "A6", "A7", "C7", "C6", "C5", "C4", "C3", "C2", "C1", "A4", "A3", "A2", "B4"],
         "rows": ["D5", "D6", "C0", "D7"]

keyboards/rmi_kb/chevron/rules.mk

@@ -1,16 +1,2 @@
 # Processor frequency
 F_CPU = 16000000
-
-# Build Options
-#   change yes to no to disable
-#
-BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
-MOUSEKEY_ENABLE = yes       # 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
-ENCODER_ENABLE = yes