docs: Prepare for new sub tree

See #11925

docs/content/en/methods/shortcode/Page.md

@@ -1,36 +0,0 @@
----
-title: Page
-description: Returns the Page object from which the shortcode was called.
-categories: []
-keywords: []
-action:
-  related: []
-  returnType: hugolib.pageForShortcode
-  signatures: [SHORTCODE.Page]
----
-
-With this content:
-
-{{< code-toggle file=content/books/les-miserables.md fm=true >}}
-title = 'Les Misérables'
-author = 'Victor Hugo'
-publication_year = 1862
-isbn = '978-0451419439'
-{{< /code-toggle >}}
-
-Calling this shortcode:
-
-```text
-{{</* book-details */>}}
-```
-
-We can access the front matter values using the `Page` method:
-
-{{< code file=layouts/shortcodes/book-details.html  >}}
-<ul>
-  <li>Title: {{ .Page.Title }}</li>
-  <li>Author: {{ .Page.Params.author }}</li>
-  <li>Published: {{ .Page.Params.publication_year }}</li>
-  <li>ISBN: {{ .Page.Params.isbn }}</li>
-</ul>
-{{< /code >}}