fix: enable user to enter their destination address for receiving funds

[thomas779]

Problem
Currently, a user can only bridge tokens and NFTs with their own address. So if they connect their Metamask, it means they will bridge tokens using their same public address.

Solution
Allow a user to send funds to any address they enter if they select the option. It cannot be empty and it must be EVM compatible.

Intended Example outcome

Note: In a later update, we can automatically send funds to the users' UP wallet address, but we will need to tell the user of that outcome.