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/core/CustomEmojiService.ts

@@ -44,6 +44,7 @@ export class CustomEmojiService {
 		category: string | null;
 		aliases: string[];
 		host: string | null;
+		license: string | null;
 	}): Promise<Emoji> {
 		const emoji = await this.emojisRepository.insert({
 			id: this.idService.genId(),
@@ -55,6 +56,7 @@ export class CustomEmojiService {
 			originalUrl: data.driveFile.url,
 			publicUrl: data.driveFile.webpublicUrl ?? data.driveFile.url,
 			type: data.driveFile.webpublicType ?? data.driveFile.type,
+			license: data.license,
 		}).then(x => this.emojisRepository.findOneByOrFail(x.identifiers[0]));
 
 		if (data.host == null) {

packages/backend/src/core/entities/EmojiEntityService.ts

@@ -50,6 +50,7 @@ export class EmojiEntityService {
 			host: emoji.host,
 			// || emoji.originalUrl してるのは後方互換性のため（publicUrlはstringなので??はだめ）
 			url: emoji.publicUrl || emoji.originalUrl,
+			license: emoji.license,
 		};
 	}