[5] As a user I want to bookmark articles

Description

Add a context menu to the articles in the main view (https://www.appcoda.com/swiftui-context-menu/) allowing them to bookmark articles. Also add dummy options to "Mark as Read" and "Share". When the Article is already bookmarked the symbol and the text in the context menu should reflect that and instead provide Un-Bookmark functionality

ToDo

• Add context menu
• Add bool attribute 'bookmarked' to Article

Acceptance Criteria

• Long press on article opens context menu
• Bookmark functionality fully working

Effort

5