[FEATURE] Add notification to approve WC requests in mobile wallet

[jribbink]

Issue to be solved

Currently, there is no integrated UI feedback for users regarding pending WC approvals within their mobile wallet.

Mobile wallets are unique because, on desktop, the wallet's interface is not available on the current device. This means that, unlike other wallet types, the provider cannot directly prompt the user for approval in their current viewing context.

1. FCL should be responsible for bridging this UI gap. A new user may not realize there is a pending request on their mobile wallet and should by supported by clear UI guidance
2. This carries the added benefit of adding a fallback deeplink for mobile users (This is important!! There are ongoing painpoints with deeplinking & popup blockers. FCL can now render a synchronous link component within this prompt as a "Try Again" for failed deeplink attempts, similar to Discovery UI)