feat: add worktop/crypto module

[lukeed]

This is a draft PR while I'm collecting feedback (and still extracting) for which other utility functions should be included here.

So far, this contains:

• digest(algo, message)
• SHA1(message)
• SHA256(message)
• SHA384(message)
• SHA512(message)

Planned/Maybe'd:

• importkey(secret, algo, scopes?)
• verify(secret, algo, message)
• sign(secret, algo, message)

BIG Maybe

NOTE: I have this, but it might be too specific to me?

• PBKDF2(input, salt, iterations, keylen, digest)

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What else should be here? 🙏

[saibotsivad]

The ones you have so far sound great, and I know I personally would use PBKDF2 on several projects, so that would be a big help for me 🤷

I don't think I use key stuff (the maybes) very often if at all, in most of the business apps I build.

[lukeed]

I think I'll merge what's here & move the Maybe items to an issue for continued brainstorming.