[Keymap] adding keymaps (#3583)

[Keymap] adding keymaps (#3583)

* add key map

* QWERTY with 40% layers

* updated line 21

updated line 21 from "#include "xd75.h" to "#include QMK_KEYBOARD_H" as requested

* upload contra folders

* Update .directory

* Update config.h

* Update config.h

* Update keymap.c

* Update config.h

* Update rules.mk

* Update keyboards/contra/keymaps/martin_bac/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keyboards/xd75/keymaps/martin_cennum/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Delete .directory

* upload

* Delete rules.mk

* Update keyboards/contra/keymaps/msiu/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keyboards/katana60/keymaps/msiu/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keyboards/katana60/keymaps/msiu/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keyboards/katana60/keymaps/msiu/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keyboards/katana60/keymaps/msiu/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Delete nano.save

* Delete rules.mk

* Update keymap.c

* Update keymap.c

* Update config.h

* Update keyboards/lets_split_eh/keymaps/msiu/keymap.c

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keyboards/lets_split_eh/keymaps/msiu/keymap.c

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keymap.c

* Update keyboards/planck/keymaps/msiu/config.h

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Apply suggestions from code review

Co-Authored-By: martinmksiu <martinmksiu@gmail.com>
* Update keymap.c

* Update readme.md

* Update keymap.c