fix: hide help sub-command & persist help flag

cli/cli.go

@@ -167,6 +167,7 @@ func newAbraApp(version, commit string) *cli.Command {
 		},
 		EnableShellCompletion:  true,
 		UseShortOptionHandling: true,
+		HideHelpCommand:        true,
 		ShellComplete:          autocomplete.SubcommandComplete,
 	}
 
@@ -194,6 +195,13 @@ func newAbraApp(version, commit string) *cli.Command {
 		return nil
 	}
 
+	cli.HelpFlag = &cli.BoolFlag{
+		Name:       "help",
+		Aliases:    []string{"h, H"},
+		Usage:      "Show help",
+		Persistent: true,
+	}
+
 	return app
 }