Redesign public hyperlight API

[ludfjig]

This issue is meant to cover redesigning the public hyperlight API for a 1.0 release. It's separate from #765, because this one is referring to redesigning the existing API, while #765 is concerned about removing public items that should not be public.

Some things I can think of right now:

• Remove Uninitiated sandbox and evolve
• Combine and/or SandboxConfiguration and SandboxRuntimeConfig
• Add builder-pattern where makes sense
• Rename MultiUseSandbox (name is outdated)
• Possibly add some light-weight type-safety to MultiUseSandbox to prevent host functions from being added (see feat(host): implement Registerable for MultiUseSandbox #1392)
• Narrow method-specific errors and error variants, rather than a catch-all HyperlightError

Please add more!

[jprendes]

AFAICT, SandboxRuntimeConfig is not a public struct so it's not part of the public API.

[syntactically]

AFAICT, SandboxRuntimeConfig is not a public struct so it's not part of the public API.

I don't think that was intentional, if that is the case. @ludfjig ?