improve blog page readability and spacing

[Himavarshit18]

I have improved the styling of the blog listing page by adding visual separation between blog posts using horizontal dividers and consistent spacing. I also added spacing before the blog pagination to improve the overall layout and readability.
The styling changes are scoped only to the blog page, ensuring that other pages of the website remain unaffected.
I have run the website locally using yarn start and verified that the blog page renders correctly. I also confirmed that the changes work as expected without introducing visual changes to other sections of the website.

Before

After

[ashley-cui]

Thanks for the PR!

This still doesn't look right - In the re-design, there are some posts with duplicate titles.

Also, I don't think this blog portion is linked anywhere in our website - almost all our blogs are on the wordpress, but I suppose it doesn't hurt to fix this?

[Himavarshit18]

Thanks for the review, I'll look into the duplicate titles and update the PR. I also wasn't aware that this blog section is no longer linked and that most posts have moved to WordPress. My intention was just to improve the existing page. If you still think it's worth keeping the change, I'll address the duplicate title issue; otherwise, I'm happy to work on another issue instead.

[ashley-cui]

It's probably more worth the time to work on other issues, but no biggie if you want to push this through.

A side note: Just a reminder to review our LLM Policy. We require all communication to be written in your own words. Some of the phrasing in this PR gives AI-generated vibes, so I figured I'd mention it.

[Himavarshit18]

The duplicate post were already present before the css changes. I understood that the root cause was duplication of post in blog/ directory. I found that there are separate files with the same title. 2020-12-07-new.md (an announcement post in the new category) and 2020-12-07-podman-posts-of-interests.md once such case of duplication. Since Docusaurus indexes both files, they both appear in the blog listing. My changes just affect the style not how the posts are rendered.