Add review-changes skill and update AGENTS.md - #912

Review changes with  

Summary of Changes

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This pull request significantly enhances the project's automated code quality tooling and documentation. It introduces a new review-changes skill designed to enforce coding standards across the codebase, providing a structured approach to identifying and rectifying common issues. Concurrently, the AGENTS.md documentation has been revised to incorporate these new standards, offering clearer guidance on code style, error handling, and organization. These changes aim to improve code consistency, maintainability, and developer efficiency by leveraging automation and updated best practices.

Highlights

• New review-changes Skill Added: A comprehensive new skill has been introduced to automate the review and fixing of local git changes against defined coding standards. This skill includes a detailed checklist covering various aspects of Rust development, from import patterns and naming conventions to error handling, code style, organization, async, database, blockchain/RPC patterns, testing, and security.
• Updated Coding Standards Documentation: The AGENTS.md file has been significantly updated to reflect new and refined coding guidelines. Key changes include updated rustfmt usage, new rules against type suffixes and unsolicited documentation, a shift in error handling preference from thiserror to plain Error types, and a new extensive section on code organization. Recommendations for hex encoding/decoding have also been updated to use primitives::hex.
• Removed push_pr Command Documentation: The documentation for the automatic push_pr command, located at .claude/commands/push_pr.md, has been removed from the repository.
• Rustfmt Edition Update: The rustfmt.toml configuration file has been updated to explicitly set the edition = "2024", aligning the project's formatting with the latest Rust edition.

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