Allow a sidebar access to other articles in the website

[AbhinavMir]

Love the website, been following it for a minute now.

Articles like: https://os.phil-opp.com/disable-simd/ go completely unnoticed unless someone reads the whole blog, however, I think these are good articles on their own too. Think they should be easier to access.

Cheers.

[phil-opp]

For the first edition, we had a "extra content" section on the front page that lists such posts. I guess something similar would make sense for the second edition too.

edit: See

blog_os/blog/templates/edition-1/index.html

Line 53 in 684ef64

{% set extra = get_section(path = "edition-1/extra/_index.md") %}

[AbhinavMir]

Thx, I can send in a PR tmrw.