feat: add lastUpdatedAt to NetworkConfiguration

[Prithpal-Sooriya]

Explanation

This allows tracking of when the network configuration was updated, which is used to enable accurate network syncing

References

Changelog

@metamask/network-controller

• ADDED: optional lastUpdatedAt to the NetworkConfiguration state. Used for performing network syncing.
• ADDED: logic to update the lastUpdatedAt when a network is added or updated.

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've highlighted breaking changes using the "BREAKING" category above as appropriate