Cranelift language bindings

#### Feature

Language bindings to the Cranelift library that allow the library to be used outside Rust.

#### Benefit

Developers of languages other than Rust could make use of the library, increasing adoption of the project.

#### Implementation

One could use the [UniFFI](https://mozilla.github.io/uniffi-rs) library, which is what [matrix-rust-sdk](https://github.com/matrix-org/matrix-rust-sdk) uses.

Alternatively, one could manually write bindings for every target language using its native FFI capabilities.