feat: add attachment position setting in email settings

- Introduced a new setting for attachment position in email settings, allowing users to choose between displaying attachments beside the sender or below the header.
- Updated the settings store to include the new attachment position type and default value.
- Added translations for the new setting in multiple languages (de, en, es, fr, it, ja, nl, pt).

app/[locale]/page.tsx

@@ -816,13 +816,13 @@ export default function Home() {
     };
   }, []);
 
-  const handleDownloadAttachment = async (blobId: string, name: string, type?: string) => {
+  const handleDownloadAttachment = async (blobId: string, name: string, type?: string, forceDownload?: boolean) => {
     if (!client) return;
 
     try {
       const { mailAttachmentAction } = useSettingsStore.getState();
 
-      if (mailAttachmentAction === 'preview' && isFilePreviewable(name, type)) {
+      if (!forceDownload && mailAttachmentAction === 'preview' && isFilePreviewable(name, type)) {
         setPreviewAttachment({ blobId, name, type });
         return;
       }