Add Ref, RelRef, and Site shortcode methods

content/en/methods/shortcode/Ref.md

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+---
+title: Ref
+description: Returns the absolute URL of the page with the given path, language, and output format.
+categories: []
+keywords: []
+action:
+  related:
+    - methods/shortcode/RelRef
+    - functions/urls/RelRef
+    - functions/urls/Ref
+  returnType: string
+  signatures: [SHORTCODE.Ref OPTIONS]
+---
+
+The map of option contains:
+
+path
+: (`string`) The path to the page, relative to the content directory. Required.
+
+lang
+: (`string`) The language (site) to search for the page. Default is the current language. Optional.
+
+outputFormat
+: (`string`) The output format to search for the page. Default is the current output format. Optional.
+
+The examples below show the rendered output when visiting a page on the English language version of the site:
+
+```go-html-template
+{{ $opts := dict "path" "/books/book-1" }}
+{{ .Ref $opts }} → https://example.org/en/books/book-1/
+
+{{ $opts := dict "path" "/books/book-1" "lang" "de" }}
+{{ .Ref $opts }} → https://example.org/de/books/book-1/
+
+{{ $opts := dict "path" "/books/book-1" "lang" "de" "outputFormat" "json" }}
+{{ .Ref $opts }} → https://example.org/de/books/book-1/index.json
+```
+
+By default, Hugo will throw an error and fail the build if it cannot resolve the path. You can change this to a warning in your site configuration, and specify a URL to return when the path cannot be resolved.
+
+{{< code-toggle file=hugo >}}
+refLinksErrorLevel = 'warning'
+refLinksNotFoundURL = '/some/other/url'
+{{< /code-toggle >}}

content/en/methods/shortcode/RelRef.md

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+---
+title: RelRef
+description: Returns the relative URL of the page with the given path, language, and output format.
+categories: []
+keywords: []
+action:
+  related:
+    - methods/shortcode/Ref
+    - functions/urls/Ref
+    - functions/urls/RelRef
+  returnType: string
+  signatures: [SHORTCODE.RelRef OPTIONS]
+---
+
+The map of option contains:
+
+path
+: (`string`) The path to the page, relative to the content directory. Required.
+
+lang
+: (`string`) The language (site) to search for the page. Default is the current language. Optional.
+
+outputFormat
+: (`string`) The output format to search for the page. Default is the current output format. Optional.
+
+The examples below show the rendered output when visiting a page on the English language version of the site:
+
+```go-html-template
+{{ $opts := dict "path" "/books/book-1" }}
+{{ .RelRef $opts }} → /en/books/book-1/
+
+{{ $opts := dict "path" "/books/book-1" "lang" "de" }}
+{{ .RelRef $opts }} → /de/books/book-1/
+
+{{ $opts := dict "path" "/books/book-1" "lang" "de" "outputFormat" "json" }}
+{{ .RelRef $opts }} → /de/books/book-1/index.json
+```
+
+By default, Hugo will throw an error and fail the build if it cannot resolve the path. You can change this to a warning in your site configuration, and specify a URL to return when the path cannot be resolved.
+
+{{< code-toggle file=hugo >}}
+refLinksErrorLevel = 'warning'
+refLinksNotFoundURL = '/some/other/url'
+{{< /code-toggle >}}

content/en/methods/shortcode/Site.md

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+---
+title: Site
+description: Returns the Site object.
+categories: []
+keywords: []
+action:
+  related:
+    - methods/page/Sites
+  returnType: page.siteWrapper
+  signatures: [SHORTCODE.Site]
+---
+
+See [Site methods].
+
+[Site methods]: /methods/site
+
+```go-html-template
+{{ .Site.Title }}
+```