WordPress Favorite Button Integration

I need a WordPress expert to implement two buttons on posts: "Save as Favorite" and "Remove from Favorite." Additionally, I want to create a dedicated user page where users can see all their favorite posts.

Requirements:
- Functionalities:
- Save a post as favorite
- Remove a post from favorites
- User Page:
- Display all favorite posts
- Information shown will be post title and featured image

Ideal Skills and Experience:
- Strong experience with WordPress development
- Proficient in custom post types and user interface modifications
- Familiarity with creating user-specific pages and integrating buttons

Please document all steps in a text file.