docs: existing-solutions.md

[robertsLando]

pkg has been archived. Mine is the most active fork as of today

[robertsLando]

I'm also adding support for sea into pkg here: yao-pkg/pkg#110

Where could I mention that?

[GabenGar]

You forgot to change the link title also.

[robertsLando]

Fixed, thanks

[cspotcode]

Is it worth adding Deno and Bun? Per the description:

exhaustively list and categorize every known solution for packaging Node.js applications as standalone executables.

Both Deno and Bun are viable options for packaging a Node.js codebase into an executable.

https://bun.sh/docs/bundler/executables
https://docs.deno.com/runtime/reference/cli/compiler/

If there's a concern that it's not truly 100% Node.js, I'd argue that is also true for several of the options on this list already: they have caveats, features they don't support.

Not sure if should be in this PR or a separate one; PR title suggests it could be used for multiple docs updates.

[robertsLando]

IS there anyone that could merge this? Maybe @mcollina ?