Prep for 0.8.0 release with Support V16 metadata and frame-decode@23

[jsdw]

Support frame-metadata v23. That stabilized V16 metadata, so we implement the relevant traits for that here to support it.

[Copilot]

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[Copilot]

Pull Request Overview

This PR prepares the 0.8.0 release by adding support for frame-metadata v23 and stabilizing V16 metadata support.

• Updates storage entries handling to invoke m.storage_entries_list() for RuntimeMetadata::V16.
• Renames several macros and applies them for metadata versions v14 through v16 in storage and extrinsic type info modules.
• Updates Cargo.toml and CHANGELOG.md to reflect the new version and dependency changes.

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/utils/list_storage_entries.rs	Updated V16 branch to use m.storage_entries_list() and renamed the macro for consistency.
src/utils.rs	Added conditional re-exports and InfoAndResolver implementation for RuntimeMetadataV16.
src/lib.rs	Extended test trait validations to include RuntimeMetadataV16.
src/decoding/storage_type_info.rs	Renamed macro to support V16 and added its implementation.
src/decoding/extrinsic_type_info.rs	Added ExtrinsicTypeInfo implementation for RuntimeMetadataV16 using the updated macro.
Cargo.toml	Bumped version to 0.8.0 and updated frame-metadata dependency to 23.0.0.
CHANGELOG.md	Documented the release changes supporting frame-metadata v23 and V16 metadata support.