Remove cruft

[timholy]

This certainly isn't complete (e.g., the documentation will be updated separately), but it's a big chunk of #382:

• officially bump the version to 3.0.0
• require a minimum of Julia 1.10
• eliminate SnoopPrecompile
• delete a lot of version-specific cruft
• add two new extensions
• remove dependency on Requires

[timholy]

I don't think this needs a detailed review, but I'd appreciate whether the general plan meets approval @aviatesk @mkitti

[mkitti]

I would leave some additional breadcrumbs about the changes and the removed features and packages.

[aviatesk]

Glad to see old code removed! I think we probably want to rename @snoopi_deep to @snoopi, while also deprecating @snoopi_deep and making it an alias for the new @snoopi?

[timholy]

How about a more wholesale renaming?

• @snoopi_deep -> @snoop_infer
• @snoopl -> @snoop_llvm
• @snoopr -> @snoop_inval

[aviatesk]

How about a more wholesale renaming?

• @snoopi_deep -> @snoop_infer
• @snoopl -> @snoop_llvm
• @snoopr -> @snoop_inval

That sounds good to me. I'm all for that.

[timholy]

Further changes, like renaming the main data-collection macros, are things I intend for a future PR.