First release tracking issue

[RDambrosio016]

Small issue to track the things that need to be done before the project will be released.

• [x] Get CGUs to work, needs work on the codegen to merge llvm ir modules, probably not too hard.
• [ ] Add a couple more basic examples.
• [ ] Update nightly close to release.
• [ ] Merge #1
• [x] Make i128 work, shouldn't be too hard, just removing special casing for it since we already handle irregular ints just fine.
• [ ] [meta] Add proper labels and maybe templates
• [x] Add the raytracer i posted to the examples
• [x] Actually pass codegen args in cuda_builder
• [ ] Make the readme
• [x] implement the ABI calculation logic, probably the hardest thing here
• [x] Use prebuilt LLVM.