Convert to HTML form (gh list version)

[ananya-ky]

Hello all,

This draft PR implements the transition to HTML form for the FAST checklist.

Note that this is one of the 2 versions that is being worked on.

• Current version - The results of the form are copied to the clipboard in a list format, which can then be pasted into a GitHub issue in your spec's repository.
• Second version - The results of the form will be copied to the clipboard in a table format, matching the appearance of the HTML form, which could then be pasted into a Github issue in your spec's repository. Here's the DRAFT PR for the gh-table version

What remains the same across both versions is the HTML form itself. The difference lies only in how the results are copied to the clipboard.

You can preview the form here: https://raw.githack.com/w3c/fast/html-form-github-list/checklist.html

[ananya-ky]

Hi @fredrika11y , I understand from your discussion with @matatk that we are aligned on this version. I've added you and @matatk as reviewers.

[matatk]

LGTM! Also same from @fredrika11y via another channel!