chore: release v0.5.0

[github-actions]

🤖 New release

• toon-format: 0.4.6 -> 0.5.0 (⚠ API breaking changes)

⚠ toon-format breaking changes

--- failure enum_variant_added: enum variant added on exhaustive enum ---

Description:
A publicly-visible enum without #[non_exhaustive] has a new variant.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#enum-variant-new
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/enum_variant_added.ron

Failed in:
  variant Token:SignedInteger in /tmp/.tmpvsvSvH/toon-rust/src/decode/scanner.rs:19
  variant Token:UnsignedInteger in /tmp/.tmpvsvSvH/toon-rust/src/decode/scanner.rs:20

--- failure enum_variant_missing: pub enum variant removed or renamed ---

Description:
A publicly-visible enum has at least one variant that is no longer available under its prior name. It may have been renamed or removed entirely.
        ref: https://doc.rust-lang.org/cargo/reference/semver.html#item-remove
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.47.0/src/lints/enum_variant_missing.ron

Failed in:
  variant Token::Integer, previously in file /tmp/.tmpsX5mtE/toon-format/src/decode/scanner.rs:19

Changelog

0.5.0 - 2026-05-22

Added

• (layout) expose decoder layout metadata behind cargo feature (#66)

Other

• Deserialization failure for u64 values larger than i64::MAX (#67)

---

This PR was generated with release-plz.