Feature/fix wallet context

[AugistineCreates]

This pr closes #233

Resolved performance issues in WalletContext caused by repeated initialization and uncleaned event listeners. This improves stability and prevents memory leaks during prolonged usage.

Changes made
-Refactored useEffect hooks to avoid unnecessary re-runs and repeated wallet setup
-Added proper cleanup functions to remove wallet kit event listeners on unmount
-Memoized the context provider value using useMemo to prevent avoidable re-renders

Result

-Eliminates memory leaks from lingering listeners
-Reduces unnecessary re-renders across components using the context
-Improves overall performance and responsiveness of wallet interactions

[drips-wave]

@AugistineCreates Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

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