refactor: break up cli pkg into nice small chunks

cli/internal/errors.go

@@ -0,0 +1,15 @@
+package internal
+
+import (
+	"os"
+
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli/v2"
+)
+
+// showSubcommandHelpAndError exits the program on error, logs the error to the terminal, and shows the help command.
+func ShowSubcommandHelpAndError(c *cli.Context, err interface{}) {
+	cli.ShowSubcommandHelp(c)
+	logrus.Error(err)
+	os.Exit(1)
+}