[Keyboard] Added Vitamins Included Rev2 (#6593)

[Keyboard] Added Vitamins Included Rev2 (#6593)

* Fixed pin for RGB

* Added support for second revision of vitamins included

* Added rev2 config and switched to #pragma once

* Switch to quantum.h pincontrol

* Fixed left-half check

* Moved revision agnostic code to main header file

* Moved common build options to main makefile

* Referred to rev2 documentation

* JTAG is dissabled in keyboard.c now

* moved EEHANDS to rev1 config

* moved rev2 to use split_common

* Updated default keymaps

* Changed handedness ifdef to allow user-overrides

* Add some space saving defines

* Changed to more sane I2C clock

* Removed rev2 check in matrix.c as rev2 uses split_common

* Removed rev2 check in rev1 only code

* Update debounce constant name

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Switch KEYMAP macro to LAYOUT

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Switch kc_keymap macro to layout_kc

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Switch kc_keymap macro to layout_kc

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Add legacy layout macro alias

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Update keyboards/vitamins_included/rev2/config.h

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Split readme into revision specific versions

* Updated src to allow LTO

* Renamed readmes to lower-case

* Switched my keyboards to FEED VID

* Fixed markdown lint errors

* fixed readme links

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>
* Maintain keymap backwards compatibility

Co-Authored-By: Joel Challis <git@zvecr.com>