Add Bun docs (JavaScript runtime)

Feature request

Summary

Bun now is going to spread fast, and most people will learn it.
You should add to the website.

Examples

[torresga]

I would love to work on this if it's available. Does this request have to be in the Trello board in order to be considered?

[1000i100]

I'm also interested :)

[M-Gonzalo]

And Bun's flagship backend framework: Elysia

[annattiwary12]

Hi! I’d love to work on this issue. I’ve used Bun in several projects, and I’m familiar with its features, like the fast bundler, test runner, and native TypeScript support. I can write clear, concise docs with helpful examples to get others started quickly. Let me know if I can take this on!

— @annattiwary12

[M-Gonzalo]

This can be a source of material

https://bun.sh/llms-full.txt
https://elysiajs.com/llms-full.txt

[spamguy]

@simon04 This can be closed.

[simon04]

Fixed via #2608.