feat: Flat import of markdown repo

This is a flat (without history) import of (some of) the content
from our markdown module.

We've imported this without history because the repo contains our
blog posts and showcases posts content prior to porting them to strapi.

Since this contains many images, it would balloon the size of this repo
to import the full history.

Instead, please refer to the history of the (archived) markdown repo
at: https://github.com/freesewing/markdown

markdown/dev/editors/howtos/blogpost/en.md

@@ -0,0 +1,15 @@
+---
+title: Adding a blog post on freesewing.org
+for: editors
+---
+
+These are the steps required to add a new [blog post](https://freesewing.org/showcase/) to the website:
+
+<ReadMore list />
+
+- Create a new folder in the `org/blog` directory of [our markdown repository](https://github.com/freesewing/markdown/) 
+ - Add an `en.md` markdown file to this folder
+ - Add one of more images to the folder
+ - Add the frontmatter to the file
+ - Add the body of the file
+