Switch to issue forms instead of templates

[jessebot]

Describe the feature you'd like, and why

See: https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository#creating-issue-forms

I want this because then it breaks up the text input fields to make it all easier to edit when asking for/providing lots of info, which is extra important when someone is filing a bug report, so they don't lose their place while scrolling around.