partially modernize `dactyl_minidox` (#21576)

* modernize `dactyl_minidox`

* Update config.h

revert RGB_MATRIX conditional

keyboards/handwired/dactyl_minidox/info.json

@@ -8,6 +8,14 @@
         "pid": "0x3536",
         "device_version": "0.0.3"
     },
+    "features": {
+        "bootmagic": true,
+        "console": false,
+        "command": false,
+        "extrakey": true,
+        "mousekey": true,
+        "nkro": true
+    },
     "ws2812": {
         "pin": "D3"
     },

keyboards/handwired/dactyl_minidox/rules.mk

@@ -1,12 +1 @@
-# 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 = yes           # Enable N-Key Rollover
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
-# AUDIO_ENABLE = yes          # Audio output
+# This file intentionally left blank