use tablewriter to format the output

Signed-off-by: jason yang <jasonyangshadow@gmail.com>

internal/app/wwctl/helper/printhelper.go

@@ -0,0 +1,27 @@
+package helper
+
+import (
+	"os"
+
+	"github.com/olekukonko/tablewriter"
+)
+
+type PrintHelper struct {
+	*tablewriter.Table
+}
+
+func NewPrintHelper(header []string) *PrintHelper {
+	tb := tablewriter.NewWriter(os.Stdout)
+	tb.SetHeader(header)
+	tb.SetAutoWrapText(false)
+	tb.SetHeaderAlignment(tablewriter.ALIGN_LEFT)
+	tb.SetAlignment(tablewriter.ALIGN_LEFT)
+	tb.SetCenterSeparator("")
+	tb.SetColumnSeparator("")
+	tb.SetRowSeparator("")
+	tb.SetHeaderLine(false)
+	tb.SetBorder(false)
+	return &PrintHelper{
+		Table: tb,
+	}
+}