Shared execution policy types for rstest-bdd.

This crate centralizes runtime policy enums so both the runtime crate and the proc-macro crate can depend on a single, canonical definition without creating a proc-macro dependency cycle.

It also provides canonical attribute-policy path resolution helpers used by macro codegen.

rstest-bdd-policy

Shared runtime policy types for the rstest-bdd workspace.

This crate provides a single source of truth for:

• execution policy enums used by both the runtime crate and the proc-macro crate.
• canonical attribute-policy path resolution used by proc-macro codegen.