TKC M0lly Layout Additions (qmk#20830)

* add matrix_diagram.md

* refactor keymaps

- update grid alignment

* info.json: apply friendly formatting

* add LAYOUT_ansi_split_bs_rshift

* add LAYOUT_ansi

* add LAYOUT_ansi_tsangan_split_bs_rshift

* add LAYOUT_ansi_tsangan

* add LAYOUT_iso_split_bs_rshift

* add LAYOUT_iso

* add LAYOUT_iso_tsangan_split_bs_rshift

* add LAYOUT_iso_tsangan

* info.json: remove extra line breaks