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/guides/plugins/hooks/en.md

@@ -0,0 +1,21 @@
+---
+title: Hooks
+order: 60
+---
+
+A **hook** is a lifecycle event. The available hooks are:
+
+ -  [preRender](/reference/hooks/prerender/): Called at the start of [`Pattern.render()`](/reference/api/pattern#render)
+ -  [postRender](/reference/hooks/postrender/): Called at the end of [`Pattern.render()`](/reference/api/pattern#render)
+ -  [insertText](/reference/hooks/inserttext/): Called when inserting text
+ -  [preDraft](/reference/hooks/predraft/): Called at the start of [`Pattern.draft()`](/reference/api/pattern#draft)
+ -  [postDraft](/reference/hooks/postdraft/): Called at the end of [`Pattern.draft()`](/reference/api/pattern#draft)
+ -  [preSample](/reference/hooks/presample/): Called at the start of [`Pattern.sample()`](/reference/api/pattern#sample)
+ -  [postSample](/reference/hooks/postsample/): Called at the end of [`Pattern.sample()`](/reference/api/pattern#sample)
+
+You can register a method for a hook. When the hook is triggered, your method will be
+called. It will receive two parameters:
+
+ - An object relevant to the hook. See the [hooks API reference](/reference/hooks/) for details.
+ - Data passed when the hook was registered (optional)
+