gh-gist: add page (#4898)

pages/common/gh-gist.md

@@ -0,0 +1,24 @@
+# gh gist
+
+> Work with GitHub Gists on the command line.
+> More information: <https://cli.github.com/manual/gh_gist>.
+
+- Create a new Gist from a space-separated list of files:
+
+`gh gist create {{path/to/files}}`
+
+- Create a new Gist with a description:
+
+`gh gist create {{filename}} --desc "{{description}}"`
+
+- Edit a Gist:
+
+`gh gist edit {{id_or_url}}`
+
+- List Gists owned by the currently logged in user:
+
+`gh gist list --limit {{int}}`
+
+- View a Gist in the default browser without rendering markdown:
+
+`gh gist view {{id_or_url}} --web --raw`