feat: ✨ add support for different link types in feature announcements

[matteoscurati]

Explanation

This PR enhances the notification-services-controller package by adding support for various link types in feature announcements. The following changes have been made:

• Added new link types: TypeExternalLinkFields, TypePortfolioLinkFields, and TypeMobileLinkFields to handle different types of links in feature announcements.
• Updated FeatureAnnouncementRawNotificationData: Included fields for external, portfolio, and mobile links.
• Updated TypeFeatureAnnouncementFields: Included fields for external, portfolio, and mobile links.
• Modified fetchFeatureAnnouncementNotifications: Updated the function to handle the new link types and include them in the notification data.

These changes improve the flexibility and functionality of feature announcements by allowing them to include various types of links.

References

• No specific issues are tied to this PR.

Changelog

@metamask/notification-services-controller

• ADDED: TypeExternalLinkFields, TypePortfolioLinkFields, and TypeMobileLinkFields types to handle different types of links in feature announcements.
• UPDATED: FeatureAnnouncementRawNotificationData to include fields for external, portfolio, and mobile links.
• UPDATED: TypeFeatureAnnouncementFields to include fields for external, portfolio, and mobile links.
• UPDATED: fetchFeatureAnnouncementNotifications to handle the new link types and include them in the notification data.

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

[Prithpal-Sooriya]

Looks good. Fix ESLint issues and also can you double check any // TODO comments related to mobile (just a quick search in this /notification-services-controller folder