feat: add recipes list/show command group (CU-868k0t6gb)

[obitum]

A4 — Recipes command group

Adds recipes list and recipes show <id>, the read-side CLI for A4/Recipes (backend CU-868k0t6g6) under the A7 CLI umbrella (CU-868k0t6gb).

A recipe is the bill of materials (formulation) for a product or variation — the materials and quantities consumed per batch, with cost/COGS rollups.

What's here

• recipes list — paginated table: ID, PRODUCT, NAME, VARIATION, BATCH, INGR, UNIT COST, UNIT COGS. Filters: --product-id, --variation-id, --updated-since (incremental sync), plus the universal --all / --page / --per-page / --json / --ndjson.
• recipes show <id> — vertical key-value detail (incl. all six cost / labour / COGS rollups) followed by an INGREDIENTS sub-table (material / qty / unit).

Design decisions

• Per-unit cost lens in the list (unit_cost + unit_cogs) — the per-unit COGS is the number makers price against.
• Human names with id fallback — product_name / variation_name / material_name, falling back to the id when null (recipes expose names that manufactures did not).

Architecture

Zero shared-core changes. Consumes the existing resourceConfig + pluggable listFilters seam built in A5 — this PR is one new commands/recipes.go mirroring commands/manufactures.go, plus the root-help row, the regenerated help golden, and the regenerated command-reference docs.

Constraints upheld

• Money stays a {amount, currency_code} string pair (*output.Money); gated/null renders —, never a float.
• No internal model-name leak — only product_id / material_id surface (the contract test asserts project_id / item_id are absent).
• 3-group goimports; go test ./... -race, go vet ./..., gofmt clean.

Testing

• Unit tests for filters, table (incl. gated costs, name/id fallback, malformed-skip), show (detail, empty ingredients, gated dashes), and the nameOrID / variationRef helpers.
• A recipes fixture contract check (envelope key, money shape, no internal-name leak).
• Root-help golden + gen-docs reference regenerated and in sync (site-CI).

🤖 Generated with Claude Code