docs(core): add markdown document outlining contribution guidelines#2432

Draft

caleywoods wants to merge 4 commits intoonivim:masterfrom caleywoods:docs/core/contributing

+67

Commits on Sep 10, 2020

Add markdown doc for contributors
Caley Woods
committed

Commits on Sep 12, 2020

Rename contributing doc to pull_request_template
Caley Woods
committed
Update pull request template verbiage
Caley Woods
committed
Correct automate(d) typo
Caley Woods
committed