Improve the UX: allow users to choose the wallet that they want to connect to the dapp

[RyanDinh8]

Hi, I'm Ryan from SubWallet (https://subwallet.app/)

The Polkadot Gifts is a great way to onboard new users from outside to Polkadot. However, right now there are only options to connect Polkadot JS, Ledger and Parity Signer to connect to the dapp.

I would suggest improving the UX and having a drop-down menu that allows users to choose the wallet they want to connect to the dapp when they click the "Connect wallet" button. (similar to the Polkadot Staking Dashboard)

We have built a solution for it, please have a look at the docs below (we are in the process of adding more wallets in the eco):

• Demo: https://connect.subwallet.app/#/welcome
• Repo: https://github.com/Koniverse/SubConnect

Also, in the last step when the new users want to start using their Polkadot accounts (after receiving the gift), we should include the links to download other wallets.

Thank you very much and looking forward!