feat(SPV-912): handle invalid configuration

[chris-4chain]

Invalid previous behavior:
instance of WalletClient is created with empty authorizations fields

For example:
client := walletclient.NewWithXPriv("localhost:3003", "")
also when we use
client := walletclient.NewWithAccessKey("localhost:3003", "")
and
client := walletclient.NewWithAdminKey("localhost:3003", "")
and
client := walletclient.NewWithXPub("localhost:3003", "")

expected behavior: instance should not be created

The "constructor" functions now also return error:

NewWithXPriv(serverURL, xPriv string) (*WalletClient, error)
NewWithXPub(serverURL, xPub string) (*WalletClient, error)
NewWithAdminKey(serverURL, adminKey string) (*WalletClient, error)
NewWithAccessKey(serverURL, accessKey string) (*WalletClient, error)

• The configurer instances besides configuring a client, make validation and return err if necessary.
• SPVError type was used - with Wrap functionality.
• The spv-wallet/models dependency was updated, because without it, the errors.Is didn't work with SPVError type.

Pull Request Checklist

• 📖 I created my PR using provided : CODE_STANDARDS
• 📖 I have read the short Code of Conduct: CODE_OF_CONDUCT
• 🏠 I tested my changes locally.
• ✅ I have provided tests for my changes.
• 📝 I have used conventional commits.
• 📗 I have updated any related documentation.
• 💾 PR was issued based on the Github or Jira issue.

[github-actions]

Manual Tests

💚 Manual testing by @Nazarii-4chain resulted in success.