[Keyboard] Keyboard Naked48 Update (#7085)

* Keyboard Naked48 Update

Support for SPLIT_KEYBOARD
Readme updates
Keymap updates
Support for RGB matrix (salicylic keymap)

* Keymap Update

Change KC_NO to KC_TRANSPARENT.
Update the old part.

keyboards/naked48/keymaps/default/rules.mk

@@ -1,29 +0,0 @@
-
-# Build Options
-#   change to "no" to disable the options, or define them in the Makefile in
-#   the appropriate keymap folder that will get included automatically
-#
-BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
-MOUSEKEY_ENABLE = no        # Mouse keys(+4700)
-EXTRAKEY_ENABLE = no        # Audio control and System control(+450)
-CONSOLE_ENABLE = no         # Console for debug(+400)
-COMMAND_ENABLE = no         # Commands for debug and configuration
-NKRO_ENABLE = no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
-MIDI_ENABLE = no            # MIDI controls
-AUDIO_ENABLE = no           # Audio output on port C6
-UNICODE_ENABLE = no         # Unicode
-BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
-RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight. 
-SWAP_HANDS_ENABLE = no      # Enable one-hand typing
-
-# If your custom naked48 pcb, you can rewrite to yes.
-LED_ANIMATIONS = yes        # LED animations
-
-ifeq ($(strip $(LED_ANIMATIONS)), yes)
-    # OPT_DEFS += -DRGBLIGHT_ANIMATIONS
-    OPT_DEFS += -DLED_ANIMATIONS
-endif
-
-# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
-SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend