feat(import-progress): track and expose Immich import progress

This change introduces a cross-language import progress API for Immich
imports and exposes a new query command to report live progress. A
new ImportProgress model captures active state, totals, and bytes
downloaded, allowing consuming code to display import status to users.

- Adds ImportProgress data type and progress tracking during import
- Exposes get_immich_import_progress command in Android and Rust
- Updates permissions and schemas to include allow-get-immich-import-progress

plugins/src/lib.rs

@@ -51,7 +51,8 @@ pub fn init<R: Runtime>() -> TauriPlugin<R> {
             commands::disconnect_immich,
             commands::get_immich_albums,
             commands::get_immich_assets,
-            commands::import_immich_assets
+            commands::import_immich_assets,
+            commands::get_immich_import_progress
         ])
         .setup(|app, api| {
             #[cfg(mobile)]