Feat/dual escrow visualization

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This pull request introduces several new dependencies and a significant update to the buyer orders dashboard in the application. The main focus is on enhancing the buyer's ability to view, filter, and confirm delivery of escrow orders, as well as preparing the codebase for future mapping features by adding Leaflet and related libraries.

Dependency additions and updates:

• Added mapping libraries and types: leaflet, react-leaflet, @react-leaflet/core, and @types/leaflet to support interactive maps in the frontend. Also added @types/geojson for type safety with geographic data. [1] [2] [3] [4] [5] [6]
• Updated several dependencies in package-lock.json to mark them as peer dependencies for better compatibility and to prevent version conflicts. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]

Buyer orders dashboard improvements:

• Rewrote the OrdersPage to show a buyer dashboard with wallet connection, dynamic filtering (all/active/completed/refunded), error/loading states, and a list of order cards. The user can now confirm delivery directly from the dashboard, which updates the order status in real time.
• Improved UI/UX by introducing filter buttons, better empty/error/loading states, and clear instructions for connecting a wallet and managing orders.

Escrow demo wording update:

• Updated the escrow demo page text to clarify that it demonstrates both sides of the barter escrow flow, with more specific instructions for the user.

Closes #26

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