Added ListCommand base

Commands/ListCommand.go

@@ -0,0 +1,27 @@
+package Commands
+
+import (
+	"fmt"
+	"github.com/urfave/cli/v2"
+	"lpm-cli/Tools"
+)
+
+func ListCommand() *cli.Command{
+	return &cli.Command{
+		Name: "list",
+		Usage: "Lists all packages",
+		Description: "Lists all packages from all registry servers.",
+		HelpName: "list",
+		Action: func(c *cli.Context) error {
+			//Do Stuff
+			return nil
+		},
+		OnUsageError: func(c *cli.Context, err error, isSubcommand bool) error {
+			if err != nil {
+				fmt.Printf("[ERROR] %s", err.Error())
+				Tools.ErrorLogger.Fatal(err)
+			}
+			return err
+		},
+	}
+}