Rework website home & download pages

[starkos]

What does this PR do?

Reworks the placeholder home and download pages on the new Docusaurus-based website.

How does this PR change Premake's behavior?

No changes to Premake itself.

Anything else we should know?

I still need to rework the header and footer, and move some content from docs/ to pages/ such as the help and "who uses" pages. Tracking the work on #1547.

Did you check all the boxes?

• Focus on a single fix or feature; remove any unrelated formatting or code changes
• Add unit tests showing fix or feature works; all tests pass
• Mention any related issues (put closes #XXXX in comment to auto-close issue when PR is merged)
• Follow our coding conventions
• Minimize the number of commits

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[KyrietS]

I still need to rework the header and footer, and move some content from docs/ to pages/ such as the help and "who uses" pages.

Just a reminder that you can create simple pages in Markdown. Docusaurus will take care of it. You don't have to use JS and React in every page.

[starkos]

Good feedback, thanks! I was going back and forth on the layout of the download links and didn't clean things up properly; I've switched them to <ul> as suggested. I'm hoping/intending to loop back and associate icons with each one at some point (why I wrapped them in <div>).

Console errors are gone. I also backed out my formatting change to docusaurus.config.js to avoid conflicts with your commit.

[KyrietS]

Thanks for the changes you've made. It looks great now. Those DownloadLink lists still can be simplified and refactored but it's good enough to merge this commit in my opinion.

And I wouldn't worry about conflicts in docusaurus.config.js. I can always do rebase and force-push to my branch :-)