feat(core): onenote importer (#15198)

#### PR Dependency Tree


* **PR #15198** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Added OneNote import support for `.one`, `.onetoc2`, and `.onepkg`,
including OneNote-to-markdown content conversion.
* OneNote now appears in the import flow with a dedicated label and
format tooltip, and file pickers recognize the new OneNote type.

* **Bug Fixes**
* Import options that are desktop-only are now disabled when not running
in the desktop app, with clear messaging.
* Improved imported asset handling by converting non-image embedded
assets into attachments for more consistent results.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/import/services/service.ts

@@ -136,6 +136,16 @@ export class ImportService extends Service {
     return commitService.commitBatch(batch);
   }
 
+  async importOneNote(file: File, context?: ImportRunContext) {
+    if (!BUILD_CONFIG.isElectron) {
+      throw new Error('OneNote import is only available in the desktop app.');
+    }
+    const commitService = this.createCommitService({
+      organize: true,
+    });
+    return commitNativeImport('oneNote', file, commitService, context);
+  }
+
   private createCommitService(options: {
     organize?: boolean;
     explorerIcon?: boolean;