Adds license (MIT OR Apache-2.0), repository (placeholder TODO URL),
readme, keywords, categories, rust-version, dual LICENSE files, and a
README install section. Adds a regression test asserting these fields
remain present so future edits cannot silently break cargo publish.
`cargo install --path crates/dirigent_fermata --features cli` produces
a working `fermata` binary; `cargo publish --dry-run` is clean.
Move all 29 workspace members from packages/<name>/ to crates/<name>/.
Updates: workspace Cargo.toml (members + path deps), justfile, root
CLAUDE.md, scripts/build/CARGO_INSTALL.md, docs/architecture/crates.md
(renamed from packages.md), structural references in docs/architecture
and docs/configuration, per-crate CLAUDE.md self-references. Historical
plans, reports, and building/ docs are left untouched.
No behavior change; just check-all stays green and fermata tests pass.
g4borg