Migrate build target markers to keyboard.json - P (#23565)

keyboards/phage_studio/pila87/keyboard.json

@@ -8,6 +8,13 @@
         "pid": "0x5887",
         "device_version": "0.0.1"
     },
+    "features": {
+        "bootmagic": true,
+        "extrakey": true,
+        "mousekey": false,
+        "nkro": true,
+        "rgb_matrix": true
+    },
     "rgb_matrix": {
         "animations": {
             "alphas_mods": true,

keyboards/phage_studio/pila87/rules.mk

@@ -1,18 +1,2 @@
 # Configure for 128K flash
 MCU_LDSCRIPT = STM32F103xB
-
-# 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
-
-# RGB Matrix enabled
-RGB_MATRIX_ENABLE = yes