Core: Implement WalletConnect v2 Integration with Multi-Chain Support

[Smartdevs17]

Description\nImplement WalletConnect v2 for wallet connections across multiple chain networks with namespace support and session management.\n\nCurrent Limitation: Limited wallet connection options.\nExpected Outcome: Full WalletConnect v2 integration with multi-chain sessions, session persistence, and QR connection.\n## Acceptance Criteria\n- [ ] WalletConnect v2 SDK integration\n- [ ] Multi-chain namespace support (eip155)\n- [ ] Session persistence\n- [ ] QR code generation\n- [ ] Deep link handling\n- [ ] Session expiry handling\n- [ ] Chain switching\n- [ ] Event subscriptions\n## Technical Scope\n- Files: frontend/wallet-connect\n- Edge Cases: Expired sessions, unsupported chains\n## Complexity Estimate\n200 points - SDK integration, multi-chain.

[Dev-sandy1]

@Dev-sandy1 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

can i work on these

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[drips-wave]

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[drips-wave]

This issue has been completed by @Dev-sandy1 as part of the Stellar Wave Program's 4th Wave 🥳

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