feat: add URL query parameter for wallet selection

[AndreMiras]

Implements support for viewing wallet positions via URL query parameters (e.g., app.aave.com/dashboard/?wallet=0xAddress or ?wallet=vitalik.eth).

Features:

• URL parameter takes precedence over localStorage
• ENS name resolution with async handling
• Silent fallback for invalid addresses

Known limitations:

• Auto-disconnect of connected wallet not implemented in this version
• Users should disconnect wallet manually before using URL parameter

Closes #2331

General Changes

• Fixes XYZ bug
• Adds XYZ feature
• …

Developer Notes

Add any notes here that may be helpful for reviewers.

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Reviewer Checklist

Please ensure you, as the reviewer(s), have gone through this checklist to ensure that the code changes are ready to ship safely and to help mitigate any downstream issues that may occur.

• [ ] End-to-end tests are passing without any errors
• [ ] Code changes do not significantly increase the application bundle size
• [ ] If there are new 3rd-party packages, they do not introduce potential security threats
• [ ] If there are new environment variables being added, they have been added to the .env.example file as well as the pertinant .github/actions/* files
• [ ] There are no CI changes, or they have been approved by the DevOps and Engineering team(s)