Navigate and manage file references in YAML files.

• Quick File Navigation: Place cursor on a file path and press ALT+d to open the file
• Reference Explorer: Explorer sidebar view showing which files reference the current YAML file
• Preview & Highlight: Click references to jump to the exact location with highlighting
• Auto-create Files: Optional setting to create files if they don't exist

• yaml-navigator.createFileIfNotExists: Create an empty file if the referenced file does not exist (default: false)

• Major architecture rewrite using YAML AST parsing
• Implemented provider pattern for extensibility
• Added reference explorer view with parent/child file references
• Added preview and highlight support
• New option to create files if not found

• Initial release with basic file navigation

Enjoy!