Revert "Zap CONTRIBUTING-WIP.md"

This reverts commit 20551867abd66320e8a0bb4a7e8b73a0b930a926.

I'll need this file as a reference, thanks for the contribution on this from @petecooper
add a temp version of CONTRIBUTING
rename CONTRIBUTING -> CONTRIBUTING.md
fix missing words in CONTRIBUTING.md
update CONTRIBUTING.md
update CONTRIBUTING.md
update B.d.1 in CONTRIBUTING.md
update list indent in CONTRIBUTING.md
update list indent in CONTRIBUTING.md, again
fix bold format in CONTRIBUTING.md
fix format in B.c.3 in CONTRIBUTING.md
upadte B.c.4 in CONTRIBUTING.md
add pre-flight checks under pull B. request
update B.c.2 in CONTRIBUTING.md
add B.e.4 in CONTRIBUTING.md
fix list indent in CONTRIBUTING.md again