v0.0.4

• refreshed pinned-nightly formatting and added explicit MSRV validation;
• added example-build coverage and quoted path-semantics test selectors in CI;
• added the versions example and excluded development-only files from packages;
• canonicalised Cargo.toml, editor configuration, ignore rules, and repository metadata;
• documented the MSRV and added the _NEVER_TO_BE_ENABLED placeholder feature;
• refreshed the test-name checker, formatting driver, and path-library documentation;