crates.io ownership of worktable_codegen is available now, so the
temporary worktable_macros name (used only for the 0.9.0 release) is no
longer needed. The package goes back to its original name and the root
manifest drops the renamed-dependency shim; the lib target and every
`use worktable_codegen::...` were never touched. worktable_macros 0.9.0
stays published as-is — nothing can depend on it accidentally since
worktable 0.9.1 pins the codegen crate by exact version.

release: 0.9.1 manifest bumps ride along (worktable 0.9.1, worktable_codegen 0.9.1, exact pin =0.9.1).