[WC] Support ?uri=wc URLs for better integration with the WC popup

[katspaugh]

Docs: https://docs.walletconnect.com/1.0/mobile-linking

If we do this, the Safe Wallet icon will appear in the WalletConnect popup on Desktop:

From Pedro:

That will be amazing and then we can update your Explorer API submission to reflect this globally in all WalletConnectModals we have a field for universal link on the Desktop Linking section once we test this then we can approve the updated submission