feat(seo): implement SEO enhancements and social media embeds

This commit introduces significant SEO improvements and enhances content embedding capabilities.

- Integrates `@nuxtjs/seo`, `@nuxtjs/sitemap`, and `@nuxtjs/robots` to boost search engine visibility.
- Configures global meta tags, including Open Graph and Twitter Cards, for richer social media sharing.
- Adds support for embedding YouTube and Facebook content directly within markdown pages.
- Introduces a new `TikTokEmbed` component for future use.

content/hall-of-fames/he-si-rong.md

@@ -3,15 +3,18 @@ name: "何四荣学长"
 photo: "hall-of-fame/he-si-rong/何四荣学长.png"
 title: "画家、作家与文化记录者"
 description: "马来西亚柔佛永平人，永平中学 1974 年毕业生。何学长为资深当代画家、作家与文化记录者，曾于吉隆坡美术学院深造，其创作多以「波光倒影 / 流动色彩」为主题，作品抽象且具内在意象，曾受媒体专访并在多项展览与校内艺术联展中担任特邀艺术家。"
-gallery: 
+gallery:
   [
     "/hall-of-fame/he-si-rong/采访照 1.jpg",
     "/hall-of-fame/he-si-rong/采访照 2.webp",
-    "/hall-of-fame/he-si-rong/作品 1.webp"
+    "/hall-of-fame/he-si-rong/作品 1.webp",
   ]
 ---
+
 # 何四荣学长
 
+<iframe width="560" height="315" src="https://www.youtube.com/embed/Nu50FOvrGhI?si=Bq06-PFEfAhS4pvE" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 ## 基本背景
 
 何四荣学长出生并成长于柔佛州永平，系永平中学 1974 年届（第九届）毕业生，之后赴吉隆坡深造艺术相关学业。作为家乡出身的艺术家，他长期活跃于本地与区域艺术圈，並多次受邀参与校内外的艺术活动与联展。([vtour.my](https://vtour.my/local-artist-%E6%9C%AC%E5%9C%9F%E7%94%BB%E5%AE%B6/?utm_source=chatgpt.com "Local artist 本土画家| VTOUR"))