feat(SEO): Add exclude filter to sitemap

- Excludes pages containing "/blog/tags" or "/blog/techs" from the sitemap.
- Reduces unnecessary crawling and indexing of non-essential sections.
- Improves SEO by focusing the sitemap on more valuable content.

README.md

@@ -39,7 +39,7 @@
         │   ├── 📁blog   # All posts page
         │   │   ├── index.astro        # Blog home page
         │   │   ├── 📁posts            # Blog posts
-        ├── │   ├── └── index.astro     #All posts page
+        ├── │   ├── └── index.astro     # All posts page
         │   │   ├── 📁tags             # Blog tags
         │   │   └── 📁techs            # Blog technologies
         │   ├── index.astro            # Home page