appendix C PR templates

I’ve created a few PR templates your team can use as starting points. They are all Markdown files; one for a new feature, one for a bug fix, and one for a documentation update. They each ask the author to provide useful pieces of information based on the type of PR. Again, these are a combination of what worked well on my teams and what would err on the side of over-communicating (which is usually helpful in these situations). As always, feel free to start out with these and then adapt or modify to your team’s needs!