* add matrix_diagram.md
* info.json: apply friendly formatting
* grid align keycodes in keymaps
* physically arrange layout macro
The switch positions available for matrix position [3, 13] are both to the left of the only position present for matrix position [4, 7]. This commit switches the two locations physically and in the keymaps.
* add LAYOUT_60_ansi_split_bs_rshift
* add LAYOUT_60_ansi_arrow
* add LAYOUT_60_tsangan_hhkb
* add LAYOUT_60_iso_split_bs_rshift
* add LAYOUT_60_iso_arrow
* add LAYOUT_60_tsangan_hhkb_iso
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