added slide component, twwek some pages, and enchanced docs

utils/newsCard.ts

@@ -9,6 +9,8 @@ import type { NewsEntry } from "./news";
  * Interface that defines property for NewsCard component
  * @property {NewsEntry} newsEntry Data of news
  * @property {boolean} isNew Mark the entry new
+ * @example
+ * <NewsCard :news-entry="articleData" :is-new="isFirstElement(articleData)" />
  */
 interface NewsCardProperty {
     newsEntry: NewsEntry;