enhance: カスタム絵文字にライセンス情報を付与できるように

Resolve #10091

packages/backend/src/server/api/endpoints/admin/emoji/copy.ts

@@ -87,6 +87,7 @@ export default class extends Endpoint<typeof meta, typeof paramDef> {
 				originalUrl: driveFile.url,
 				publicUrl: driveFile.webpublicUrl ?? driveFile.url,
 				type: driveFile.webpublicType ?? driveFile.type,
+				license: emoji.license,
 			}).then(x => this.emojisRepository.findOneByOrFail(x.identifiers[0]));
 
 			await this.db.queryResultCache?.remove(['meta_emojis']);