[Feature] Path per user

The feature I am currently moving to Immich with my whole family and my sister has a small child. As a result, she already takes over 40,000 photos and videos. That quickly takes up more than 400GB. When importing, I ran into the problem that my server SSD doesn't have enough space. So I bought a second one. But now you can only put external libraries in another directory and even then, thumbnails and encoded videos are written to the main directory. I think it would be quite useful if we can specify a path per user so that the directory structure changes as follows: current: - library - encoded-video - USER1 - USER2 - library - USER1 - USER2 - thumbs - USER1 - USER2 - upload - USER1 - USER2 after: - library - USER1 - encoded-video - library - thumbs - upload - USER2 - encoded-video - library - thumbs - upload This makes it easy to moun…