Implement rate limit bypass, smart fallback scraping, and price alerts

feat: fresh start - repository cleanup and updated gitignore

feat(portability): Implement PDF export using fpdf2

feat(persistence): Add favorites manager and integrate into GUI

feat(expansion): Refactor for international search (Scrapers, Agent, CLI, GUI)

feat(gui): Add Favorites sidebar placeholder

style(gui): Refine Dark Mode styling and emoji icons

feat(gui): Handle search results and open report

feat(gui): Integrate HollandVacationAgent with threading

feat(gui): Implement input validation

feat(gui): Add input forms and search button

feat(gui): Create basic Tkinter GUI scaffolding with Dark Mode