//! Command-line front ends.
//!
//! - `ktfmt` — a drop-in for ktfmt's CLI: same flags, messages, exit codes and stdin/stdout.
//! - `ktlint` — a drop-in for ktlint's CLI (2.0.0-ALPHA-4, or 1.8.0 with `--ktlint-version=1.8`): same flags,
//! reporters, messages and exit codes.
//! - `ktrs` — the native command (`ktrs fmt`, `ktrs lint`), a thin layer over the same engines, and
//! `ktrs serve` for build tools (ktfmt and ktlint requests), `ktrs lsp` (crates/ktrs-lsp) for editors, and
//! `ktrs migrate` (crates/ktrs-project's `migrate`) for switching builds to the drop-ins.