Add error_set_part macro

[mcmah309]

No description provided.

[Copilot]

Pull request overview

This PR introduces the error_set_part! macro to enable distributed error set definitions across multiple files. Instead of defining all errors in a single location, developers can now define error parts in different modules, which are automatically combined into a single error_set! macro at build time via the combine_error_set_parts() function.

Key changes:

• Added new error_set_part! macro that generates use statements for error types
• Implemented build-time combining of error_set_part definitions into a centralized error_set.rs file
• Added combine_parts feature with the ignore crate dependency for file system traversal
• Reorganized examples into an examples/ directory structure

Reviewed changes

Copilot reviewed 13 out of 18 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
error_set_impl/src/lib.rs	Adds new error_set_part! proc macro that extracts error names and generates use statements
error_set/src/lib.rs	Exports combine_error_set_parts function when combine_parts feature is enabled
error_set/src/combine_parts.rs	Implements file scanning, parsing, and combining logic to merge error_set_part definitions
error_set/Cargo.toml	Adds ignore dependency and combine_parts feature (set as default)
examples/error_set_part/	Complete example demonstrating distributed error definitions across multiple files
examples/test_no_std/	Moved from root to examples directory, demonstrates no_std compatibility
Cargo.toml	Updates workspace members to include new examples and exclude test_no_std
.github/workflows/ci.yml	Updates CI path to reflect test_no_std relocation

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.