chore: release v0.13.0

[acp-release-bot]

🤖 New release

• agent-client-protocol-schema: 0.12.2 -> 0.13.0 (⚠ API breaking changes)

⚠ agent-client-protocol-schema breaking changes

--- failure copy_impl_added: type now implements Copy ---

Description:
A public type now implements Copy, causing non-move closures to capture it by reference instead of moving it.
        ref: https://github.com/rust-lang/rust/issues/100905
       impl: https://github.com/obi1kenobi/cargo-semver-checks/tree/v0.46.0/src/lints/copy_impl_added.ron

Failed in:
  agent_client_protocol_schema::ProtocolVersion in /tmp/.tmpYQXeeR/agent-client-protocol/src/version.rs:12

--- failure enum_missing: pub enum removed or renamed ---

Description:
A publicly-visible enum cannot be imported by its prior path. A `pub use` may have been removed, or the enum itself 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/v0.46.0/src/lints/enum_missing.ron

Failed in:
  enum agent_client_protocol_schema::Response, previously in file /tmp/.tmphiuOcF/agent-client-protocol-schema/src/rpc.rs:66

Changelog

0.13.0 - 2026-04-29

Other

• (unstable) Start setting up v2 Schema scaffolding for experimentation (#1099)
• reorganize to v1 module (#1094)

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