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/reference/api/pattern/needs/en.md

@@ -0,0 +1,25 @@
+---
+title: needs()
+---
+
+```js
+bool pattern.needs(string partName)
+``` 
+
+Returns `true` or `false` depending on whether a pattern part is *needed*, based 
+on the value of [pattern.settings.only](/reference/settings/only/) and the 
+part dependencies listed in the configuration file.
+
+A part is needed if:
+
+ - it is requested by the user in the `only` setting
+ - it is a dependency of a part requested by the user in the `only` setting
+ - the `only` setting is not set or is `false`, and the part is not hidden
+
+<Note>
+
+You don't typically use this method. Instead, configure part
+dependencies in your [configuration file](/reference/config/).
+
+</Note>
+