Add poll_seconds, poll_millis & poll_micros attributes

[zeenix]

These attributes could be used to declare a controller method that's run by the run method, periodically based on the timeout specified.

[Copilot]

Pull request overview

This PR adds support for periodic poll methods in controllers using three new attributes: poll_seconds, poll_millis, and poll_micros. Poll methods are automatically called by the controller's run() loop at specified intervals using embassy_time::Ticker. Methods with identical timeout values and units are grouped together and executed sequentially when the ticker fires.

• Adds PollMethod struct and parsing logic to handle poll attributes on controller methods
• Implements duration-based grouping to optimize ticker usage for methods with the same interval
• Integrates poll methods into the run() method's select loop using select_biased!

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/controller/item_impl.rs	Implements poll method parsing, attribute removal, and code generation logic. Adds PollDuration enum and generate_poll_code function to create ticker declarations and select arms.
tests/integration.rs	Adds integration test for poll methods using mock time driver to verify polling intervals and method grouping behavior.
README.md	Documents poll method feature with usage examples and key characteristics.
CLAUDE.md	Updates internal architecture documentation to describe poll methods implementation.
Cargo.toml	Simplifies embassy-time dev dependency by removing defmt features and adding mock-driver for testing.
Cargo.lock	Updates lockfile to reflect dependency changes, removing defmt-related packages.

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