doc: create bug report issue form

[BenjaminAmos]

Description

Since I was looking from the project documentation anyway, I thought I'd try-out the new (beta) issue forms. This makes the new issue process look a bit nicer, although that's about it. I've mostly re-used the existing issue template for this form, with some areas re-worded.

Testing

You can preview the form here and test it by creating a new issue on https://github.com/BenjaminAmos/DestinationSol.

[BenjaminAmos]

For non-code PRs like this, is there a way of skipping CI so that it doesn't waste resources when there's absolutely nothing new to test?