docs: Prepare for new sub tree

See #11925

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

@@ -1,70 +0,0 @@
----
-title: Sitemap
-description: Returns the sitemap settings for the given page as defined in front matter, falling back to the sitemap settings as defined in the site configuration.
-categories: []
-keywords: []
-action:
-  related: []
-  returnType: config.SitemapConfig
-  signatures: [PAGE.Sitemap]
-toc: true
----
-
-Access to the `Sitemap` method on a `Page` object is restricted to [sitemap templates].
-
-## Methods
-
-ChangeFreq
-: (`string`) How frequently a page is likely to change. Valid values are `always`, `hourly`, `daily`, `weekly`, `monthly`, `yearly`, and `never`. Default is "" (change frequency omitted from rendered sitemap).
-
-```go-html-template
-{{ .Sitemap.ChangeFreq }}
-```
-
-Priority
-: (`float`) The priority of a page relative to any other page on the site. Valid values range from 0.0 to 1.0. Default is -1 (priority omitted from rendered sitemap).
-
-```go-html-template
-{{ .Sitemap.Priority }}
-```
-
-## Example
-
-With this site configuration:
-
-{{< code-toggle file=hugo >}}
-[sitemap]
-changeFreq = 'monthly'
-{{< /code-toggle >}}
-
-And this content:
-
-{{< code-toggle file=content/news.md fm=true >}}
-title = 'News'
-[sitemap]
-changeFreq = 'hourly'
-{{< /code-toggle >}}
-
-And this simplistic sitemap template:
-
-{{< code file=layouts/_default/sitemap.xml >}}
-{{ printf "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"yes\"?>" | safeHTML }}
-<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
-  xmlns:xhtml="http://www.w3.org/1999/xhtml">
-  {{ range .Pages }}
-    <url>
-      <loc>{{ .Permalink }}</loc>
-      {{ if not .Lastmod.IsZero }}
-        <lastmod>{{ .Lastmod.Format "2006-01-02T15:04:05-07:00" | safeHTML }}</lastmod>
-      {{ end }}
-      {{ with .Sitemap.ChangeFreq }}
-        <changefreq>{{ . }}</changefreq>
-      {{ end }}
-    </url>
-  {{ end }}
-</urlset>
-{{< /code >}}
-
-The change frequency will be `hourly` for the news page, and `monthly` for other pages.
-
-[sitemap templates]: /templates/sitemap-template/