Refactor global function access

[friuns2]

This pull request introduces a significant refactor across multiple components and the addition of a new TypeScript declaration file to improve the handling of global functions within the project.

• New TypeScript Declaration File: Adds a globals.d.ts file to declare global functions such as calculateDirections, updateDistances, calculateDistance, updateLocation, placeHomeMarker, and clearMarkers. This centralizes the declaration of global functions, making them more manageable and accessible across the project.
• Refactoring Components: Updates several Vue components (AttractionDetails.vue, AttractionList.vue, LocationModal.vue, and MapView.vue) to replace direct globalThis access with direct function calls as declared in globals.d.ts. This change streamlines the code and leverages TypeScript's type-checking features for better code reliability.
• State Management: The state.js file remains unchanged, indicating that the global state management strategy does not directly utilize the newly declared global functions or has been refactored in a way that does not require modification to the state management logic.

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