fix: add, rename and remove sensor

changes:
- Implement function to add, rename and remove sensors

pkg/cli/cli.go

@@ -0,0 +1,48 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"text/tabwriter"
+
+	"github.com/volker-raschek/flucky/pkg/config"
+)
+
+// PrintSensors displays a list with all configured sensors
+func PrintSensors(cnf *config.Config, w io.Writer) error {
+
+	// declar tabwriter
+	tw := tabwriter.NewWriter(w, 0, 0, 3, ' ', 0)
+
+	fmt.Fprint(tw, "name\tlocation\ttype\twire-id\ti2c-bus\ti2c-address\tgpio\ttick-duration\tenabled\n")
+
+	for _, sensor := range cnf.Sensors {
+		fmt.Fprintf(tw, "%v\t%v\t%v\t", sensor.Name, sensor.Location, sensor.Model)
+
+		if sensor.WireID != nil {
+			fmt.Fprintf(tw, "%v\t", *sensor.WireID)
+		} else {
+			fmt.Fprintf(tw, "\t")
+		}
+
+		if sensor.I2CBus != nil {
+			fmt.Fprintf(tw, "%v\t", *sensor.I2CBus)
+		} else {
+			fmt.Fprintf(tw, "\t")
+		}
+
+		if sensor.I2CAddress != nil {
+			fmt.Fprintf(tw, "%#v\t", *sensor.I2CAddress)
+		} else {
+			fmt.Fprintf(tw, "\t")
+		}
+
+		fmt.Fprintf(tw, "%v\t", sensor.GPIONumber)
+
+		fmt.Fprintf(tw, "%v\t%v\n", sensor.TickDuration, sensor.Enabled)
+	}
+
+	tw.Flush()
+
+	return nil
+}