docs: Prepare for new sub tree

See #11925

docs/content/en/methods/page/Keywords.md

@@ -1,46 +0,0 @@
----
-title: Keywords
-description: Returns a slice of keywords as defined in front matter.
-categories: []
-keywords: []
-action:
-  related: []
-  returnType: '[]string'
-  signatures: [PAGE.Keywords]
----
-
-By default, Hugo evaluates the keywords when creating collections of [related content].
-
-[related content]: /content-management/related
-
-{{< code-toggle file=content/recipes/sushi.md fm=true >}}
-title = 'How to make spicy tuna hand rolls'
-keywords = ['tuna','sriracha','nori','rice']
-{{< /code-toggle >}}
-
-To list the keywords within a template:
-
-```go-html-template
-{{ range .Keywords }}
-  {{ . }}
-{{ end }}
-```
-
-Or use the [delimit] function:
-
-```go-html-template
-{{ delimit .Keywords ", " ", and " }} → tuna, sriracha, nori, and rice
-```
-
-[delimit]: /functions/collections/delimit
-
-Keywords are also a useful [taxonomy]:
-
-{{< code-toggle file=hugo >}}
-[taxonomies]
-tag = 'tags'
-keyword = 'keywords'
-category = 'categories'
-{{< /code-toggle >}}
-
-[taxonomy]: /content-management/taxonomies