Introduce a justfile to standardize the project's everyday commands so
contributors no longer need to remember the exact cargo invocations and
flags. Until now these commands lived only in shell history and memory,
which made the non-obvious ones (the LTO profile, the native install
incantation) easy to get wrong.
Recipes provided:
- dev (default): cargo run with passthrough args
- fmt: nightly rustfmt + tombi for TOML + just --fmt, mirroring the
formatting already applied in recent commits (e.g. fc851e8)
- clippy: lint the whole workspace, all targets
- build / build-release / build-production: the three build tiers, with
build-production using the release-lto profile defined in Cargo.toml
- install: install targeting the native CPU and x86_64-unknown-linux-gnu
via the release-lto profile, force-overwriting any existing binary
- clean: cargo clean
The fmt and install recipes depend on external tools (fd, tombi, nightly
toolchain); these are assumed present in the dev environment and are not
auto-installed here.
Test Plan:
- `just --list` lists all recipes without parse errors
- `just --unstable --fmt --check` reports the file is already formatted
- `just build` and `just clippy` succeed against the current tree
