* add matrix_diagram.md
* info.json: apply friendly formatting
* info.json: fix key overlap
Fixes the Numpad Enter key overlapping the second Numpad 0 key (bottom right of numpad).
* info.json: add matrix position [7, 1]
Adds matrix position [7, 1] to the layout data (bottom half of split Numpad Plus).
* add LAYOUT_2u_bs_275u_rshift
