Rart60 Layout Additions (#20785)

* add matrix_diagram.md

* info.json: apply friendly formatting

* add LAYOUT_ansi_tsangan_split_bs_rshift

* add LAYOUT_ansi_tsangan

* add LAYOUT_ansi_wkl_split_bs_rshift

* add LAYOUT_ansi_wkl

* add LAYOUT_ansi_hhkb_split_bs_rshift

* add LAYOUT_ansi_hhkb

* add LAYOUT_ansi_cwkl_split_bs_rshift

* add LAYOUT_ansi_cwkl

* Apply suggestions from code review

Co-authored-by: Ryan <fauxpark@gmail.com>

---------

Co-authored-by: Ryan <fauxpark@gmail.com>