Add support for Deno as package manager

[MichaelDeBoey]

Clear and concise description of the problem

Deno is now a package manager with deno install

Suggested solution

Update all public methods to be able to recognize Deno as well

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[benmccann]

We might also have to add extra support specifically for Deno in getUserAgent added in #20 or try to implement support in Deno (denoland/deno#25342)

[Malix-Labs]

@benmccann denoland/deno#25342 has just been closed 🚀

[birkskyum]

In case it's helpful for you, if you don't see the agent (i got undefined). I've just looked at adding deno to the solidjs cli, and found the agent only show when deno executes a npm:package or a package.json script - see here