Add basic symlink handling

[A-Walrus]

Solve #10.

When viewing a folder with a symlink, the metadata will be based on the pointed to file, and not the original.

Also added a field to Item to track whether it is a symlink, so we can put an icon or something indicating it.

For now marked as draft as I don't know what icon to put/where so I just marked them with a T/F (in list view) to show whether it is a symlink. Need design input on where to put what icon (emblem-symbolic-link?) in both grid and list view.

New

Old

Nautilus (for reference)

TODO

• Icons
  • List
  • Grid
• handle broken symlinks