Add codenew shortcode to style guide

added review changes for #18231

content/en/docs/contribute/style/style-guide.md

@@ -380,6 +380,24 @@ The output is:
 
 {{< kat-button >}}
 
+### Downloadable code blocks
+
+Use {{</* codenew */>}} to make code samples (eg manifests) downloadable.
+Pages that provide ready-to-run sample manifests should put them in respective localized folder, (eg) content/en/examples/application/deployment.yaml (for English localization) and reference the downloadable code sample directly, using the {{</* codenew */>}} shortcode.
+
+eg: {{</* codenew file="application/deployment.yaml" */>}}
+
+The output is:
+
+{{< codenew file="application/deployment.yaml" >}}
+
+Example page containing above shortcode:
+
+https://kubernetes.io/docs/concepts/overview/working-with-objects/kubernetes-objects/
+
+Code samples may also have some localized context which should be updated in respective localized folder. Typically, code samples do not change, however natural-language comments can be translated.
+For example: https://github.com/kubernetes/website/blob/master/content/ko/examples/application/deployment.yaml is the `ko` version for https://github.com/kubernetes/website/blob/master/content/en/examples/application/deployment.yaml
+
 ## Common Shortcode Issues
 
 ### Ordered Lists