refactor(frontend): frontend-embed/src/to-be-sharedを共通化 (#14536)

* refactor(frontend): shouldCollapsedを共通化

* refactor(frontend): config.js, worker-multi-dispatch.js, intl-const.jsを共通化

* fix(frontend-shared): fix type error

* refactor(frontend): is-link.jsと、同一の振る舞いをする記述を共通化

* fix

* fix lint

* lint fixes

packages/frontend-shared/js/emoji-base.ts

@@ -19,7 +19,7 @@ export function char2fluentEmojiFilePath(char: string): string {
 	// Fluent Emojiは国旗非対応 https://github.com/microsoft/fluentui-emoji/issues/25
 	if (codes[0]?.startsWith('1f1')) return char2twemojiFilePath(char);
 	if (!codes.includes('200d')) codes = codes.filter(x => x !== 'fe0f');
-	codes = codes.filter(x => x && x.length);
-	const fileName = codes.map(x => x!.padStart(4, '0')).join('-');
+	codes = codes.filter(x => x != null && x.length > 0);
+	const fileName = (codes as string[]).map(x => x.padStart(4, '0')).join('-');
 	return `${fluentEmojiPngBase}/${fileName}.png`;
 }