Unit Tests for Wallet Adapters Issue #350

[Ndanusa]

Description

This PR implements the task to add generic Wallet Adapter types and specifically implement and unit test the Freighter wallet adapter for the AnchorPoint frontend.

What was done

• Wallet Adapters interface: Added generic types for wallet interactions (types.ts).
• Freighter Adapter: Implemented FreighterAdapter class for interacting with @stellar/freighter-api.
• Unit Tests: Created comprehensive unit tests for FreighterAdapter to ensure maximum coverage and correct handling of connection states, errors, and cancellations (FreighterAdapter.test.ts).
• Dev Dependencies: Installed and configured vitest to enable execution of unit tests within the dashboard Vite project.
• Configuration updates: Updated package.json to include "test": "vitest run" and added vitest.config.ts.

Acceptance Criteria Handled

• Implementation completed according to project standards.
• Code is properly documented and commented.
• Unit/Integration tests provided.
• Passing CI pipeline readiness (tests, lint, build prepared).
• Maintained institutional dark mode aesthetic alignment in any potential future frontend usage by decoupling logic properly.

Testing Steps

Run the following from the /dashboard directory to execute unit tests:

npm run test

Related Issues

Closes #350
Closes #352

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@Ndanusa 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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[Ceejaytech25]

LGTM!