chore: update blog content for clarity, SEO, and performance improvements; refine sitemap handling and configuration settings

package.json

@@ -36,7 +36,6 @@
     "@astrojs/mdx": "^4.3.3",
     "@astrojs/react": "^4.3.0",
     "@astrojs/rss": "^4.0.12",
-    "@astrojs/sitemap": "^3.4.2",
     "@astrojs/vercel": "^8.2.5",
     "@expressive-code/plugin-collapsible-sections": "^0.41.3",
     "@expressive-code/plugin-line-numbers": "^0.41.3",