Feat: Add a useBalance hook for ERC20s

[davelange]

Closes #236

Add a useBalance hook, based on the wagmi equivalent, that fetches balance info for ERC 20 tokens.

const { data } = useBalance({
  address, // address to fetch balance for
  token, // token address, defaults to ETH token
  formatUnits // defaults to token decimals
})

Returns the original balance, formatted balance, symbol, and decimals:

Balance: {data.formatted} {data.symbol}

[fracek]

Looks good! Can you create a changelog entry with pnpm changeset? this one can be a patch change.

[davelange]

@fracek done

[fracek]

Thanks!

[fracek]

Also, contact me on telegram for the OnlyDust contribution.