* add new layout for 65% with blocker and add matching keymap
the rev2 pcb gets used in the kbd67 which has a blocker between the left arrow key and the right ctrl key. this layout is missing so far even though it's probably the most used one for this board.
* add split backspace layout with blocker
* change keycode for backslash
* update rules.mk and add missing layouts in info.json
* Update keyboards/kbdfans/kbd67/rev2/rules.mk
Co-Authored-By: Joel Challis <git@zvecr.com>
Co-authored-by: Joel Challis <git@zvecr.com>
