added new layout and Olivierko keymap for dz60 (#6996)

added new layout and Olivierko keymap for dz60 (#6996)

* - added new layout for dz60
- created personal keymap using new layout

* - changes based on pr feedback from @noroadsleft

* - further readme formatting

* Apply suggestions from code review

applied changes based on review feedback

Co-Authored-By: fauxpark <fauxpark@gmail.com>
* - readme formatting

* Apply suggestions from code review

Co-Authored-By: noroadsleft <18669334+noroadsleft@users.noreply.github.com>