Critical fixes:
- gen-index.sh: emit services, config, optional_system_deps from bakery.toml;
parse product list from registry TOML instead of hardcoded array; fail loudly
when bakery.toml is missing (was silently producing empty metadata in prod)
- install.rs: download service units and example configs from dl server at
install time (were never fetched); check systemctl exit codes (were swallowed);
save state before file cleanup in remove_package (was inconsistent on error)
- doctor.rs: rewrite dep detection to use `pacman -Q` as primary (no more
dependency on `which` or pkg-config name mismatches); add optional_system_deps
support returning (missing, warnings) — warnings print but never block install
- get.sh: fix GitHub fallback URL (was 404 for both latest and versioned
releases); add SHA-256 checksum verification using published .sha256 file
High priority fixes:
- bakery doctor <unknown-pkg>: exit non-zero (was silently passing)
- bakery update: add --all flag (documented in README but missing from CLI);
add doctor gate before update (was bypassing dep check)
- bread_deps: now resolved recursively with cycle detection (was ignored)
- manifest.rs: add artifact_urls() helper and optional_system_deps field
- state.rs: atomic save via tmp+rename; cmd_info shows optional_system_deps
Tests: 17 new unit tests across doctor, download, install, state modules;
scripts/test-gen-index.sh fixture test for full pipeline
- bakery: strip -x86_64 / -aarch64 / -arm64 / -armv7 suffix when placing
binary so `breadcrumbs-x86_64` installs as `breadcrumbs`
- gen-index.sh: GH_BASE was "github.com/Breadway" but repo slugs already
include the org, producing doubled paths; change to "github.com"
