In this diff we introduce the `UserProfileAvatarModal` and we add an `onClick` callback to the user avatar which pushes this modal whenever the `onClick` callback gets triggered
This is step 4 in the list below
Outlined below are the steps I will take in this stack (each point here will be it's own diff):
1. Introduce `FullScreenViewModal` file and move everything from the `ImageModal` file into here, and change what is absolutely necessary (the imports)
2. Lift the rendering of `mediaModalItem` out of `FullScreenViewModal`
3. Finish renaming + updating remaining variables/callbacks to make `FullScreenViewModal` completly generic
4. Introduce `UserProfileAvatarModal`
Linear Task: https://linear.app/comm/issue/ENG-5202/introduce-fullscreenavatarviewmodal
Depends on D9497