Refactor ps2avrgb i2c ws2812 to core (#7183)

* Refactor ps2avrgb i2c ws2812 to core

* Refactor jj40 to use ws2812 i2c driver

* Refactor ps2avrgb template to use ws2812 i2c driver

* Add ws2812 stub files

* clang-format and driver config

* Add ws2812 driver docs

* Fix default config values

* Update tmk_core/protocol/vusb/main.c

Co-Authored-By: Drashna Jaelre <drashna@live.com>

keyboards/jj40/rules.mk

@@ -40,7 +40,7 @@ SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
 NKRO_ENABLE = no            # USB Nkey Rollover
 BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality on B7 by default
 RGBLIGHT_ENABLE = yes       # Enable keyboard RGB underglow
-RGBLIGHT_CUSTOM_DRIVER = yes
+WS2812_DRIVER = i2c
 MIDI_ENABLE = no            # MIDI support (+2400 to 4200, depending on config)
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
@@ -48,6 +48,4 @@ AUDIO_ENABLE = no           # Audio output on port C6
 FAUXCLICKY_ENABLE = no      # Use buzzer to emulate clicky switches
 HD44780_ENABLE = no 		# Enable support for HD44780 based LCDs (+400)
 
-SRC += i2c_master.c
-
 LAYOUTS = ortho_4x12 planck_mit