BARCODE Refactor

A comprehensive architectural refactor of the BARCODE repository.
Essentially no changes to core functionality or GUI — just a cleaner, more modular structure.

Highlights

• Modular Architecture: Separated core logic, GUI, analysis, visualization, and utilities into focused modules
• Type-Safe Config & Results: Dataclass-based configs and structured analysis outputs
• Headless Procesing: Core analysis pipeline no longer requires GUI dependencies
• Auto-Generated GUI Config: Maintains type safety while eliminating code duplication