- Add mise.toml (prek 0.3.2) and .pre-commit-config.yaml with hooks for
trailing whitespace, end-of-file, YAML check, merge conflicts, large files,
cargo fmt, cargo clippy (-D warnings), and unit tests
- Add prek/mise recipes to justfile
- Run cargo fmt to fix formatting issues
- Fix all clippy warnings: collapse nested if statements, derive Default for Avatar
