Save settings when quitting

Idk if this is necessary... Maybe it won't be

main.go

@@ -7,6 +7,7 @@ import (
 	"io"
 	"log"
 	"os"
+	"os/signal"
 
 	"github.com/wailsapp/wails/v2"
 	"github.com/wailsapp/wails/v2/pkg/options"
@@ -55,6 +56,27 @@ func main() {
 
 	addonService = &AddonService{}
 	addonService.Addons = settings.Addons
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+	go func() {
+		<-c
+		err = settingsFile.Truncate(0)
+		if err != nil {
+			Error.Printf("error truncating settings file: %s", err)
+		}
+		_, err = settingsFile.Seek(0, 0)
+		if err != nil {
+			Error.Printf("error seeking settings file: %s", err)
+		}
+		err = json.NewEncoder(settingsFile).Encode(settings)
+		if err != nil {
+			Error.Printf("error encoding settings: %s", err)
+		}
+		settingsFile.Close()
+		os.Exit(0)
+	}()
+
 	return
 	app := NewApp()