Add all config to docshelper.json

Also consolidate so the mediaTypes and outputFormats are listed once only.

Fixes #11328

content/en/getting-started/configuration.md

@@ -112,7 +112,7 @@ deep
 
 Note that you don't need to be so verbose as in the default setup below; a `_merge` value higher up will be inherited if not set.
 
-{{< code-toggle config="mergeStrategy" skipHeader=true />}}
+{{< code-toggle file="hugo" dataKey="config_helpers.mergeStrategy" skipHeader=true />}}
 
 ## All configuration settings
 

content/en/templates/output-formats.md

@@ -20,7 +20,7 @@ A [media type] (also known as _MIME type_ and _content type_) is a two-part iden
 
 This is the full set of built-in media types in Hugo:
 
-{{< datatable "media" "types" "type" "suffixes" >}}
+{{< datatable "config" "mediaTypes" "_key" "suffixes" >}}
 
 **Note:**
 
@@ -61,7 +61,7 @@ Given a media type and some additional configuration, you get an **Output Format
 
 This is the full set of Hugo's built-in output formats:
 
-{{< datatable "output" "formats" "name" "mediaType" "path" "baseName" "rel" "protocol" "isPlainText" "isHTML" "noUgly" "permalinkable" >}}
+{{< datatable "config" "outputFormats" "name" "mediaType" "path" "baseName" "rel" "protocol" "isPlainText" "isHTML" "noUgly" "permalinkable" >}}
 
 - A page can be output in as many output formats as you want, and you can have an infinite amount of output formats defined **as long as they resolve to a unique path on the file system**. In the above table, the best example of this is `AMP` vs. `HTML`. `AMP` has the value `amp` for `Path` so it doesn't overwrite the `HTML` version; e.g. we can now have both `/index.html` and `/amp/index.html`.
 - The `MediaType` must match the `Type` of an already defined media type.