feat: man pages

closes #269

man_cmd.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	mcobra "github.com/muesli/mango-cobra"
+	"github.com/muesli/roff"
+	"github.com/spf13/cobra"
+)
+
+var manCmd = &cobra.Command{
+	Use:                   "man",
+	Short:                 "Generates manpages",
+	SilenceUsage:          true,
+	DisableFlagsInUseLine: true,
+	Hidden:                true,
+	Args:                  cobra.NoArgs,
+	RunE: func(*cobra.Command, []string) error {
+		manPage, err := mcobra.NewManPage(1, rootCmd)
+		if err != nil {
+			return err
+		}
+		_, err = fmt.Fprint(os.Stdout, manPage.Build(roff.NewDocument()))
+		return err
+	},
+}