feat: adding support for custom provider on connector arguments

[falleco]

Description

Adding more customisation options to the connector creator to allow:

• custom Provider handling
• custom connector metadata (like name, icon, id) and not use static 'zksync-sso'

[Copilot]

Pull Request Overview

This PR adds customization options to the ZKsync SSO connector, allowing developers to override default connector metadata and provide custom provider implementations instead of being limited to the hardcoded "zksync-sso" configuration.

• Introduces ConnectorMetadata type for customizable connector properties (icon, id, name, type)
• Adds optional provider and connectorMetadata parameters to ZksyncSsoConnectorOptions
• Updates connector creation to use custom metadata with fallback to default values

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