rpk: add page (#18977)

pages/common/rpk.md

@@ -0,0 +1,36 @@
+# rpk
+
+> Manage Redpanda topics, clusters, groups, security and more via a single binary.
+> More information: <https://docs.redpanda.com/current/reference/rpk/>.
+
+- Create a new topic:
+
+`rpk topic create {{topic_name}}`
+
+- Produce a message to a topic:
+
+`rpk topic produce {{topic_name}}`
+
+- Consume messages from multiple topics:
+
+`rpk topic consume {{topic_name1 topic_name2 ...}}`
+
+- List all topics:
+
+`rpk topic list`
+
+- Display cluster information:
+
+`rpk cluster info`
+
+- List all consumer groups:
+
+`rpk group list`
+
+- Describe a consumer group with lag information:
+
+`rpk group describe {{group_name}}`
+
+- Display version:
+
+`rpk version`