- Add bakery.toml describing the bakery binary as an installable product
- gen-index.sh: check DL_DIR/<pkg>/bakery.toml first (written by each
product's release workflow), fall back to sibling checkout for local dev
- gen-index.sh: include bakery itself in the products list
- release.yml: use GITHUB_WORKSPACE instead of ECOSYSTEM_DIR (the
bread-ecosystem runner IS the checkout, no separate clone needed)
- release.yml: copy bakery.toml to DL_DIR during artifact prep
