Add Tuner

[OpenSauce]

Closes #28

The screens can now be completely refactored, so that we don't use "dialogs" going forwards

[Copilot]

Pull Request Overview

This PR adds a new tuner feature to the audio amplifier application, implementing pitch detection and a GUI display. The tuner uses the AMDF (Average Magnitude Difference Function) algorithm to detect fundamental frequencies and displays note information, frequency, and tuning accuracy.

• Implements a new Tuner struct with AMDF pitch detection algorithm
• Adds tuner integration to the audio processing pipeline with real-time frequency analysis
• Creates a comprehensive tuner dialog interface with visual feedback for tuning accuracy

Reviewed Changes

Copilot reviewed 10 out of 11 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/sim/tuner.rs	New tuner implementation with AMDF pitch detection and note conversion
src/sim/mod.rs	Exports the new tuner module
src/io/processor.rs	Integrates tuner into audio processing pipeline with sample feeding and info updates
src/io/manager.rs	Adds tuner management with channel communication and enable/disable controls
src/gui/messages.rs	Adds tuner-related message types for UI interaction
src/gui/components/mod.rs	Reorganizes component structure to include dialogs module
src/gui/components/dialogs/tuner.rs	Comprehensive tuner display with visual pitch indicator and status feedback
src/gui/components/dialogs/mod.rs	Module declaration for dialog components
src/gui/app.rs	Integrates tuner dialog into main application with subscription-based updates

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