[Keymap] Userspace Keymap Updates (#5215)

[Keymap] Userspace Keymap Updates (#5215)

* enable velocikey for my userspace and explicitly for my 75% layout

* add guards to only turn on RGB stuff if the RGB pin is actually defined

* update 60_ansi keymap

* update the 60_ansi_split_bs_rshift keymap

* update 66_ansi keymap

* update docs

* Update layouts/community/60_ansi/mechmerlin-ansi/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* Update layouts/community/60_ansi_split_bs_rshift/mechmerlin-split/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* Update layouts/community/60_ansi_split_bs_rshift/mechmerlin-split/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* Update layouts/community/66_ansi/mechmerlin/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* Update layouts/community/60_ansi_split_bs_rshift/mechmerlin-split/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* Update layouts/community/60_ansi/mechmerlin-ansi/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* Update layouts/community/60_ansi/mechmerlin-ansi/keymap.c

Co-Authored-By: mechmerlin <30334081+mechmerlin@users.noreply.github.com>
* remove my attempt to find a good way to detect this

* move audio clicky into user space and do feature setting per keyboard

* fixup 66_ansi keymap

* update changelog

* update readme