Update languages.json to add sv-SE

Swedish translation

src/lib/i18n/locales/languages.json

@@ -95,4 +95,8 @@
 		"code": "zh-TW",
 		"title": "Chinese (Traditional)"
 	}
+	{
+		"code": "sv-SE",
+		"title": "Swedish"
+	}
 ]