Added help text for data controller (#20057)

Co-authored-by: Candice Ye <canye@microsoft.com>

extensions/arc/package.json

@@ -665,6 +665,18 @@
             ],
             "when": true
           }
+        ],
+        "helpTexts": [
+          {
+            "template": "%arc.data.controller.help.text%",
+            "links": [
+              {
+                "text": "%arc.data.controller.help.text.documentation.page%",
+                "url": "https://docs.microsoft.com/cli/azure/connectedk8s?view=azure-cli-latest#az-connectedk8s-connect"
+              }
+            ],
+            "when": true
+          }
         ]
       },
       {

extensions/arc/package.nls.json

@@ -234,6 +234,8 @@
 	"arc.agreement.sql.help.text.learn.more": "Learn more",
 	"arc.agreement.sql.help.text.learn.more.ariaLabel": "Learn more about Azure Arc enabled Managed Instance",
 	"arc.sql.pitr.retention.description": "Configure retention for point-in-time backups. {0}",
+	"arc.data.controller.help.text": "The Kubernetes cluster must already be arc-enabled with the az connectedk8s connect command. Please use our {0} to learn more.",
+	"arc.data.controller.help.text.documentation.page": "documentation page"
 	"arc.agreement.sql.help.text.terms.of.use": "Terms of use",
 	"arc.agreement.sql.help.text.privacy.policy": "Privacy policy",
 	"arc.agreement.sql.help.text.azure.marketplace.terms": "Azure Marketplace Terms"