pub const STATE_DIR: &'static str;Expand description
Local (gitignored) project-scoped state directory - mirrors the ~/.mecha10
user-home convention (user::MECHA10_DIR) but scoped to this project checkout, for
caches/state that are specific to one clone and shouldn’t be committed to git (e.g.
mecha10 dev’s Python dependency preflight cache - see
DEV_PREFLIGHT_CACHE_FILE/handlers/dev/ops/preflight.rs in the mecha10-cli crate).