feat(core,fuse,gui,cli): album management

New requests CreateAlbum, RenameAlbum, DeleteAlbum, AddToAlbum and
RemoveFromAlbum, backed by proton-drive-rs 0.6.6. The Albums view gains a
New Album button and a card menu with Rename and Delete; photos gain Add
to Album (menu and selection bar) and Remove from Album inside an album.
CLI: pdfs new-album, rename-album, delete-album, add-to-album,
remove-from-album.

Also fixes the album view state: the timeline filters are hidden on the
album grid, the header counts albums, Back keeps the grid and its scroll
position, and the timeline is only reloaded when an album replaced it.

docs/CHANGELOG.md

@@ -83,6 +83,16 @@ Schema: **31** (unchanged).
   In the list view a Location column shows which folder each hit is in. Pinned files listed by the
   search prompt and `pdfs-query` show whether they are on disk, instead of always showing them as
   not downloaded.
+- **Album management.** The Albums view has a New Album button, and an album's right-click menu
+  offers Rename… and Delete Album…. Deleting an album keeps its photos in the timeline. A photo's
+  menu and the selection bar offer Add to Album…, and inside an album, Remove from Album takes a
+  photo out without trashing it. Albums shared with you only open. The CLI gains `pdfs new-album`,
+  `rename-album`, `delete-album`, `add-to-album` and `remove-from-album`. This needs
+  proton-drive-rs 0.6.6.
+- **Albums view fixes.** The timeline's filter row no longer shows over the album grid. The header
+  counts albums. Back from an album returns to the grid where you left it instead of reloading it,
+  and going from Albums back to Timeline keeps the timeline's scroll position unless an album was
+  opened in between.
 - **US spelling throughout.** The app, the CLI and the docs say "Favorite" and "color", matching the
   `pdfs favorite` command.