In the [toolchain] section of the Letlang project configuration file:

• the letlang field correspond to the version of the letlang_runtime Rust crate
• the rust field correspond to the Rust edition to use for the compilation of the generated Rust crates

The compiler MUST add the letlang_runtime Rust crate as a dependency to every generated Rust crate, under the name llcore_runtime.

The compiler MUST scan the module imports to generate the dependencies of each generated Rust crate.