feat: add CLI support for user secrets (#24270)

Adds a coder secret command group for managing user secrets from the
CLI, with create, update, list, and delete subcommands backed by the
existing user secret API.

This branch adds CLI test coverage and refreshes the generated help
output and CLI reference docs for the new command group.

cli/root.go

@@ -104,6 +104,7 @@ func (r *RootCmd) CoreSubcommands() []*serpent.Command {
 		r.portForward(),
 		r.publickey(),
 		r.resetPassword(),
+		r.secrets(),
 		r.sharing(),
 		r.state(),
 		r.tasksCommand(),
@@ -319,14 +320,9 @@ func (r *RootCmd) Command(subcommands []*serpent.Command) (*serpent.Command, err
 	cmd.Walk(func(cmd *serpent.Command) {
 		// TODO: we should really be consistent about naming.
 		if cmd.Name() == "delete" || cmd.Name() == "remove" {
-			if slices.Contains(cmd.Aliases, "rm") {
-				merr = errors.Join(
-					merr,
-					xerrors.Errorf("command %q shouldn't have alias %q since it's added automatically", cmd.FullName(), "rm"),
-				)
-				return
+			if !slices.Contains(cmd.Aliases, "rm") {
+				cmd.Aliases = append(cmd.Aliases, "rm")
 			}
-			cmd.Aliases = append(cmd.Aliases, "rm")
 		}
 	})