gen-bazel 0.1.5

gen — Bazel BUILD.bazel + MODULE.bazel renderer. Sibling of gen-nix (per-crate Nix) and gen-nix-bulk (per-tree Nix); same typed Manifest in, typed Starlark out. Operators pick the backend via shikumi config — the same source-of-truth typed Manifest renders to Nix or Bazel mechanically.