docs: expand help for 'talosctl get'

Make it more obvious how to get list of all resources.

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>

cmd/talosctl/cmd/talos/get.go

@@ -37,7 +37,7 @@ var getCmd = &cobra.Command{
 	Use:        "get <type> [<id>]",
 	Aliases:    []string{"g"},
 	SuggestFor: []string{},
-	Short:      "Get a specific resource or list of resources.",
+	Short:      "Get a specific resource or list of resources (use 'talosctl get rd' to see all available resource types).",
 	Long: `Similar to 'kubectl get', 'talosctl get' returns a set of resources from the OS.
 To get a list of all available resource definitions, issue 'talosctl get rd'`,
 	Example: "",

website/content/v1.3/reference/cli.md

@@ -1350,7 +1350,7 @@ Generate CAs, certificates, and private keys
 
 ## talosctl get
 
-Get a specific resource or list of resources.
+Get a specific resource or list of resources (use 'talosctl get rd' to see all available resource types).
 
 ### Synopsis
 
@@ -2482,7 +2482,7 @@ A CLI for out-of-band management of Kubernetes nodes created by Talos
 * [talosctl etcd](#talosctl-etcd)	 - Manage etcd
 * [talosctl events](#talosctl-events)	 - Stream runtime events
 * [talosctl gen](#talosctl-gen)	 - Generate CAs, certificates, and private keys
-* [talosctl get](#talosctl-get)	 - Get a specific resource or list of resources.
+* [talosctl get](#talosctl-get)	 - Get a specific resource or list of resources (use 'talosctl get rd' to see all available resource types).
 * [talosctl health](#talosctl-health)	 - Check cluster health
 * [talosctl images](#talosctl-images)	 - List the default images used by Talos
 * [talosctl inject](#talosctl-inject)	 - Inject Talos API resources into Kubernetes manifests