Replace modulo operations with is_multiple_of calls and simplify nested if
statements using let-chains in the grammar generator.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (gemma-4-31B-it-UD-Q4_K_XL.gguf)
Add new examples for generating sample .improv data based on the Pest
grammar and pretty-printing existing .improv files.
Co-Authored-By: fiddlerwoaroof/git-smart-commit (gemma-4-31B-it-UD-Q4_K_XL.gguf)