Add view with Gitpod Flex instructions

Author: jeanp413

package.json

@@ -379,6 +379,11 @@
 					"name": "Workspace",
 					"icon": "$(squirrel)",
 					"when": "false"
+				},
+				{
+					"id": "gitpod-flex-help",
+					"name": "Help",
+					"icon": "$(squirrel)"
 				}
 			]
 		},
@@ -387,6 +392,10 @@
 				"view": "gitpod-login",
 				"when": "gitpod.authenticated != true && !gitpod.inGitpodFlexRemoteWindow",
 				"contents": "You have not yet signed in with Gitpod\n[Sign in](command:gitpod.signIn)"
+			},
+			{
+				"view": "gitpod-flex-help",
+				"contents": "Connecting to Gitpod Flex environments requires installing the [Gitpod Flex extension](https://marketplace.visualstudio.com/items?itemName=gitpod.gitpod-flex) and opening them through the [Gitpod Flex](https://app.gitpod.io/). This view is only to manage [Gitpod Classic](https://gitpod.io/workspaces) workspaces."
 			}
 		]
 	},