blog: Blog content module article (#2085)

* feat: blog article content module

* blog: improvements

* feat: add screenshot

* feat: added buttons and code links

* Update creating-blog-with-nuxt-content.md

* blog: add image to article

* feat: add videos

* feat: video for api

* Update creating-blog-with-nuxt-content.md

* fix: fix broken links

* fix typos

Co-authored-by: Sébastien Chopin <seb@nuxtjs.com>
Co-authored-by: Alexandre Chopin <alex@orion.sh>