Add a first-class wallet connection experience so users can connect supported wallets from the OrionPay UI.

[memplethee-lab]

Issue Description

Add a first-class wallet connection experience so users can connect supported wallets from the OrionPay UI.

Problem

Users do not currently have a consistent way to connect their wallet, which blocks onboarding and any future wallet-based interactions.

Scope

• Add UI support for connecting MetaMask, WalletConnect, and Stellar wallet providers.
• Display the connected wallet address, network status, and disconnect action.
• Handle connection errors, unsupported networks, and reconnect flows gracefully.

Acceptance Criteria

• A user can connect at least one supported wallet from the UI.
• The connected address and wallet status are visible in the interface.
• Failed connections and disconnect actions provide clear feedback.
• The flow works on both desktop and mobile layouts.

Suggested Implementation Notes

• Reuse existing wallet-related state and UI patterns where possible.
• Keep the experience simple and accessible for first-time users.
• Avoid exposing private keys or sensitive wallet information in the UI.