Codegen for Ares

[eamsden]

Supersedes #89 with much cleaner history and rebased onto status. @matthew-levan work on integrating the codegen into rust-side Ares should happen here.

Edward TODO

• [x] Fix missing cases in linearizer
• [ ] cons/decons and move renaming in linearizer
• [ ] %phi and %hip elimination in linearizer (minimize register set?)
• [x] move +wink to a separate hoon file or even generator (make sure axes are re-established in rust-side code)
• [x] tag top-level codegen core with an incrementing version constant, and check it on rust side (make sure axes are re-established in rust-side code)
• [x] In-depth review of rust-side execution code
• [ ] Thoroughly review linearizer crash and poison logic
• [ ] Thread "which interpreter" enum through context
• [ ] Thread slow stack through jets and jet helpers
• [ ] Add to or delete from hill hamt by diffs emitted from +poke in codegen core
• [ ] Make jets and helpers use "which interpreter" enum