[TASK-10656] feat: remove external wallets

[jjramirezn]

Very comprehensive PR removing external wallets logic from the app.

Flows tested: Send Link creation and claming (also guest and xchain flow), request creation and fulfillment (also with guest and xchain flow)

Right now is set merge to feat/index-claim-links, this is because it was based on that branch. Dont merge when approved

Summary by CodeRabbit

• New Features

  • Cached gas fee estimation added for improved transaction feedback.

• Removals

  • Multi-wallet support, wallet selection, and related UI components removed.
  • Wallet details page, wallet header, wallet card, and wallet toggle button components deleted.
  • External wallet support and associated flows eliminated.
  • "Wallet" section removed from app navigation.
  • Complex link creation, cross-chain, and gasless transaction flows removed.
  • Legacy wallet connection hooks and Redux wallet state management for multiple wallets deleted.

• Improvements

  • Wallet management streamlined to a single wallet type with simplified connection and balance handling.
  • Wallet balance display and refresh made more direct and reliable.
  • Token and chain selectors now receive balances as props and fetch details asynchronously.
  • Payment and claim flows simplified, reducing complexity and potential user errors.
  • Wallet connection and modal visibility managed via Redux state.
  • Integration of Wagmi hooks alongside ZeroDev improves connection and transaction consistency.
  • UI components like FlowHeader simplified with fewer props and external dependencies.

• Bug Fixes

  • Prevented errors from undefined wallet balances by defaulting to zero.

• Refactor

  • Internal wallet logic and Redux state significantly simplified for better maintainability.
  • Removed legacy wallet and external wallet flags from components and hooks.
  • Claim and payment flows refactored to unify connection state and streamline transaction handling.
  • Utility functions updated to accurately identify supported tokens.

• Chores

  • Removed unused dependencies and utility functions.
  • Cleaned up and reordered imports for clarity.
  • Added documentation comments to claim API method.