feat(core,fuse,gui): places view from photo locations

Photos now know where they were taken. proton-drive-rs 0.7.0 reads the
Location from a photo's extended attributes, and the timeline refresh stores
it with the photo (schema v33). The migration marks every photo unresolved
once, so the next refresh backfills locations from node metadata without
downloading anything.

Towns are looked up offline: pdfs-core bundles GeoNames' cities15000 table,
trimmed by scripts/geonames-cities.py, and files each photo under the
nearest town within 50 km. The new PhotoPlaces and PlacePhotos requests list
the towns and page one town's photos.

The Photos page gets a third view, Places, with a card per town (newest
photo, town, country, count). A place opens in the gallery like an album.
Country names come translated from the iso-codes catalogs, now an optional
dependency. The About dialog credits GeoNames (CC BY 4.0).

po/POTFILES.in

@@ -9,6 +9,7 @@ crates/pdfs-gui/src/app/pages/locations.rs
 crates/pdfs-gui/src/app/pages/login.rs
 crates/pdfs-gui/src/app/pages/photo_viewer.rs
 crates/pdfs-gui/src/app/pages/photos.rs
+crates/pdfs-gui/src/app/pages/places.rs
 crates/pdfs-gui/src/app/pages/shared.rs
 crates/pdfs-gui/src/app/pages/shared_by_me.rs
 crates/pdfs-gui/src/app/pages/status.rs