FEAT: Fetch Following List and Display in a Dialog

[muntaxir4]

Is your feature request related to a problem? Please describe.
Currently, users cannot view the list of people they are following. A dialog should display the following list, each linking to the respective user’s profile. Endpoints affected /profile and /user/{handle}

Describe the solution you'd like

1. Implement an action flow (GET_USER_FOLLOWINGS_START, GET_USER_FOLLOWINGS_SUCCESS, GET_USER_FOLLOWINGS_FAIL) to retrieve followings from Firestore.
2. Store following data in the Redux store under profile.user.followings.
3. Display following users in a dialog, where:
   • Each entry shows a profile picture and display name and user handle.
   • Clicking on an entry redirects to their profile page without hard refresh.
4. Show a loading state (with a loading button) while fetching the list.

Describe alternatives you've considered

• Fetching on every dialog open (not efficient without caching).

Additional context
This feature will enhance navigation by allowing users to easily access profiles of people they follow.