2026 updates

[A-CGray]

Opening this PR to start the discussion on website updates for 2026. I have made some changes already based on what we discussed in our meeting at SciTech 2026:

• Changed the website name to "MDO Benchmarks for Aircraft Design", perhaps we should also change the name of the repo so that the URL matches?
• Created separate sections of the website for the STW and DLR-F25. The F25 section may just end up linking to the official DLR site once that launches but I think this site should still list it so that we have a complete list.
• Added a section on the landing page about how people can get involved in the working group meetings and SciTech special sessions, not yet complete.
• Added a page in the STW section listing published papers that have used the STW, not yet complete.
• Added a directory in the repo for STW reference results, along with formatting instructions for people who want to upload their own. We may want to use a separate repo for this.

[kejacobson]

Ali, since this has useful website information for today's discussion. I'm going to go ahead and merge it. Thanks for doing this