feat(mobile): Used cached network image to display people picture

[JobiJoba]

Description

Previously, people image where shown using NetworkImage, I've created a common widget as it was the exact same code everywhere and use CachedNetworkImage instead

**I'm wondering if it won't be better to use the ImmichImage instead?? **

Fixes # (issue)

How Has This Been Tested?

Multiple places used a Circle Avatar People

Screenshots (if appropriate)

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation if applicable
• [x] I have no unrelated changes in the PR.
• [x] I have confirmed that any new dependencies are strictly necessary.
• [x] I have written tests for new code (if applicable)
• [x] I have followed naming conventions/patterns in the surrounding code
• [x] All code in src/services/ uses repositories implementations for database calls, filesystem operations, etc.
• [x] All code in src/repositories/ is pretty basic/simple and does not have any immich specific logic (that belongs in src/services/)

[JobiJoba]

Looking at the code a bit deeper

String getFaceThumbnailUrl(final String personId) {
  return '${Store.get(StoreKey.serverEndpoint)}/people/$personId/thumbnail';
}

I assume that when we select a new picture for a person; it erases the old one from /personId/thumbnail and replace it. If it's true, we need to find something else to use as a CacheKey. I think I can try to pass down everywhere we need the thumbnailPath (only places where it's not easy is in the search result where there are some wrapping around the person)

flutter: 
imageURL: http://localhost:3000/api/people/5e995d67-79b2-472b-a09e-bb082464cbca/thumbnail 
thumbnailPath:  upload/thumbs/2a6f31c6-820f-4f47-b7b5-d131dc0486a7/5e/99/5e995d67-79b2-472b-a09e-bb082464cbca.jpeg

@shenlong-tanwen Do you agree?

[JobiJoba]

Hey I don't think we should merge that without fixing the comment before or else when people will change the picture it will only refresh when the cache will be cleared.

[zackpollard]

Hey, I am going to close this for now due to it being stale for a while. If you find a way to resolve the cache key issue, then feel free to comment here to have it re-opened. If you need input from someone, feel free to ping them here too to get their input!