Hey Bitbucket geniuses!
I'm a Jira/Confluence admin and don't know much about Bitbucket because I don't traditionally write code. I have a coder in the house that can translate for me so be descriptive and talk shop if needed. 
I want to be like Jira and add a Custom Field on the Create a PR page.

Use Case: I'd like a field named Release Notes that the dev can fill in while in Bitbucket. This field will get sent to Jira where the writers can have a dashboard that collects all the PRs with Release Notes in them.
Is it possible? I saw the documentation about {{commit_messages}} but that's not very elegant. Is that all we've got?
Thank you!
- Christa