fix: added token balance fix bug with duplicate baseUrl

[addegbenga]

Changes

1. Implemented functionality to display balance for the selected token.
2. Fixed duplicate path issues in the Avnu service.
3. Created a custom hook to optimize balance fetching.

Details

• Token Balance Display: Added a feature to show the balance of the currently selected token, improving user visibility into their assets.

• Avnu Service Fix: resolved issues related to duplicated paths in the Avnu service, which caused swap not to work on prod.

• Custom Balance Hook:

  • Identified that the useBalance hook from starknet core was making multiple fetch.
  • Implemented a custom hook to optimize balance fetching, reducing network requests and improving performance.