New macro design & goodies that comes with that

[zeenix]

• Macro now operates on a module
• Abstract the user from signal & state change types
• Attribute to generate client-side setters
• Add an e2e testcase
• Bump version

[Copilot]

Pull request overview

This PR refactors the firmware-controller macro to operate on modules instead of separate struct and impl items, improving ergonomics and enabling better coordinated code generation. The changes abstract signal and state change types from users and introduce a new pub_setter attribute for generating client-side setters.

Key Changes

• Module-based macro design: The #[controller] attribute now applies to a module containing both the struct and impl block, enabling coordinated processing
• Client-side pub_setter generation: New #[controller(publish(pub_setter))] attribute generates public setter methods on the client API
• Comprehensive integration test: Added end-to-end test validating all controller features including state changes, signals, and pub_setters

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/integration.rs	New comprehensive integration test demonstrating controller functionality with state management, signals, and pub_setters
src/lib.rs	Refactored macro entry point to parse modules instead of individual struct/impl items
src/controller/mod.rs	New module expansion logic that validates and coordinates struct/impl processing
src/controller/item_struct.rs	Enhanced to return PublishedFieldInfo for coordinated impl processing and parse pub_setter attribute
src/controller/item_impl.rs	Added pub_setter channel generation, client methods, and stream getter methods for published fields and signals
README.md	Updated examples and documentation to reflect module-based usage and pub_setter feature
CLAUDE.md	Updated architecture documentation to describe module-based processing flow
Cargo.toml	Version bump to 0.3.0 and added dev dependencies for testing (futures std/executor, critical-section)
Cargo.lock	Updated lock file with new dependency versions and transitive dependencies

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