[FEATURE]: giscus.app to allow comments on blog posts

[e-perl-NOAA]

Please describe the feature you are requesting.
There is a GitHub app called giscus that allows you to have "comments" on a website that become/are stored as discussions. I have tried it out in my repo fork where there is the comments section and then there is the discussion. Discussions are only generated when someone makes a comment on that webpage.

To do this, giscus must be enabled on FIMS website repo which can be done here and the simple html script below is added to each qmd file (I could just add it to our template files so that it's already there).

<script src="https://giscus.app/client.js"
        data-repo="NOAA-FIMS/noaa-fims.github.io"
        data-repo-id="R_kgDOQY_HVA"
        data-category="Blog discussions"
        data-category-id="DIC_kwDOQY_HVM4C61mh"
        data-mapping="title"
        data-strict="0"
        data-reactions-enabled="1"
        data-emit-metadata="0"
        data-input-position="bottom"
        data-theme="noborder_light"
        data-lang="en"
        crossorigin="anonymous"
        async>
</script>

@kellijohnson-NOAA
Is this something that would be useful on the FIMS pages? If so, there are a couple questions:

1. Should the discussions go on the website discussion board or on the FIMS discussion board?
2. Should it be enabled for fims-weekly post AND other blog posts or just blog posts?

I'm also hoping that this would 1) encourage more people to create blog posts and 2) get more people to engage with the FIMS github discussions.