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/mobile.rs

@@ -88,4 +88,7 @@ impl<R: Runtime> Wallpaper<R> {
     pub fn import_immich_assets(&self, payload: ImmichImportRequest) -> crate::Result<WallpaperState> {
         self.0.run_mobile_plugin("importImmichAssets", payload).map_err(Into::into)
     }
+    pub fn get_immich_import_progress(&self) -> crate::Result<ImmichImportProgress> {
+        self.0.run_mobile_plugin("getImmichImportProgress", ()).map_err(Into::into)
+    }
 }