gh-api: add page (#5127)

pages/common/gh-api.md

@@ -0,0 +1,36 @@
+# gh api
+
+> Makes authenticated HTTP requests to the GitHub API and prints the response.
+> More information: <https://cli.github.com/manual/gh_api>.
+
+- Display the subcommand help:
+
+`gh api --help`
+
+- Display the releases for the current repository in JSON format:
+
+`gh api repos/:owner/:repo/releases`
+
+- Create a reaction for a specific issue:
+
+`gh api --header {{Accept:application/vnd.github.squirrel-girl-preview+json}} --raw-field '{{content=+1}}' {{repos/:owner/:repo/issues/123/reactions}}`
+
+- Display the result of a GraphQL query in JSON format:
+
+`gh api graphql --field {{name=':repo'}} --raw-field '{{query}}'`
+
+- Send a request using a custom HTTP method:
+
+`gh api --method {{POST}} {{endpoint}}`
+
+- Include the HTTP response headers in the output:
+
+`gh api --include {{endpoint}}`
+
+- Do not print the response body:
+
+`gh api --silent {{endpoint}}`
+
+- Send a request to a specific GitHub Enterprise Server:
+
+`gh api --hostname {{github.example.com}} {{endpoint}}`