Migrate build target markers to keyboard.json - HI (#23540)

keyboards/handwired/prkl30/feather/keyboard.json

@@ -1,4 +1,14 @@
 {
+    "features": {
+        "bluetooth": true,
+        "bootmagic": true,
+        "command": true,
+        "console": true,
+        "encoder": true,
+        "extrakey": false,
+        "mousekey": false,
+        "nkro": true
+    },
     "rgblight": {
         "saturation_steps": 8,
         "brightness_steps": 8,

keyboards/handwired/prkl30/feather/rules.mk

@@ -1,18 +1,2 @@
 # Processor frequency
 F_CPU = 8000000
-
-# Build Options
-#   change yes to no to disable
-#
-BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
-ENCODER_ENABLE = yes
-MOUSEKEY_ENABLE  = no       # Mouse keys
-EXTRAKEY_ENABLE  = no       # Audio control and System control
-CONSOLE_ENABLE  = yes       # Console for debug
-COMMAND_ENABLE  = yes       # Commands for debug and configuration
-NKRO_ENABLE = yes           # Enable N-Key Rollover
-BACKLIGHT_ENABLE  = no
-AUDIO_ENABLE  = no          # This can be enabled if a speaker is connected to the expansion port. Not compatible with RGBLIGHT below
-RGBLIGHT_ENABLE  = no       # This can be enabled if a ws2812 strip is connected to the expansion port.
-
-BLUETOOTH_ENABLE = yes