WalletConnect initialisation doesn't track error and loading state on the app

[clemente-xyz]

Description

Our WalletConnect implementation is not handling error and loading states of the library properly.

Sometimes the initialisation fails, or stills loading, and the app doesn't show the user that failure.

Also, there are some pending improvements missing to implement on the WalletConnect package that Lisk Mobile shares with Lisk Desktop.

Bellow they are listed:

1. Include translations to plain-text content.
2. Handle sign client initialization error (we are currently only console logging the error message).
3. Remove await on useEffect of useSession hook.
4. Add missing UT for hooks and utils.

See #1998 comments for more details.