Extract the formula AST and parser into a dedicated `improvise-formula`
crate and convert the project into a Cargo workspace.
The root crate now re-exports `improvise-formula` as `crate::formula` to
maintain backward compatibility for internal callers. The repository map is
updated to reflect the new crate structure.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (gemma-4-31B-it-UD-Q4_K_XL.gguf)
Move module declarations from src/main.rs to a new src/lib.rs to transition
the project to a library-first structure. This allows other tools and
examples to utilize the core logic.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (gemma-4-31B-it-UD-Q4_K_XL.gguf)
