Refactor MkDocs blog structure, enhance SCSS watcher, and improve plugin configuration (#103)

- Adjusted `mkdocs.sh` to expand SCSS watcher to include `docs` and `mkdocs.yml`.
- Simplified blog template by extracting post logic to `partials/post.html`.
- Updated `mkdocs.yml` with refined plugins including RSS, meta, and enhanced blog options.
- Improved blog Markdown files with structural changes and better TOC handling.
- Removed unused styles and deprecated logic in blog posts for cleaner maintenance.

docs/blog/index.md

@@ -1,6 +1,7 @@
 ---
 hide:
 - navigation
+- toc
 ---
 
 # Blog