After FY23 redesign: checklist for forks

[hauten]

If another org wants to fork this repo and use it for their own website (like SNL did), what would they need to change and where? Create a handy checklist for this. Perhaps add it as a subsection of https://github.com/LLNL/llnl.github.io/issues/632.

Add, then populate, the following according on contribute.md:

{% capture accordionContent %}

{% endcapture %} {% assign accordionContent = accordionContent | markdownify %} {% include components/accordion.html title='How do I adapt this website for my own organization?' content=accordionContent %}

[LRWeber]

Also related to #481