refactor: break up cli pkg into nice small chunks

cli/server/server.go

@@ -0,0 +1,26 @@
+package server
+
+import (
+	"github.com/urfave/cli/v2"
+)
+
+// Reminder: The list commands are in is the order they appear in the help menu
+var ServerCommand = &cli.Command{
+	Name:      "server",
+	ArgsUsage: "<host>",
+	Usage:     "Manage the servers that host your apps",
+	Description: `
+Manage the lifecycle of a server.
+
+These commands support creating new servers using 3rd party integrations,
+initialising existing servers to support Co-op Cloud deployments and managing
+the connections to those servers.
+`,
+	Subcommands: []*cli.Command{
+		serverNewCommand,
+		serverInitCommand,
+		serverAddCommand,
+		serverListCommand,
+		serverRemoveCommand,
+	},
+}