Migrate features from rules.mk to data driven - EFGH (#23248)

keyboards/flehrad/downbubble/keyboard.json

@@ -7,6 +7,14 @@
     "pid": "0x0000",
     "device_version": "0.0.1"
   },
+  "features": {
+    "bootmagic": false,
+    "command": true,
+    "console": true,
+    "extrakey": true,
+    "mousekey": true,
+    "nkro": false
+  },
   "matrix_pins": {
     "cols": ["F7", "C7", "C6", "C5", "C4", "C3", "C2", "C1", "C0", "E1", "E0", "D7", "D6", "D5", "D4", "D3", "D2", "D1", "D0", "B7"],
     "rows": ["F1", "F2", "F3", "F4", "F5", "F6"]

keyboards/flehrad/downbubble/rules.mk

@@ -1,12 +0,0 @@
-# Build Options
-#   change yes to no to disable
-#
-BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
-MOUSEKEY_ENABLE = yes       # Mouse keys
-EXTRAKEY_ENABLE = yes       # Audio control and System control
-CONSOLE_ENABLE = yes        # Console for debug
-COMMAND_ENABLE = yes        # 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