add --version

Signed-off-by: Hadi <hadi@example.com>

flake.nix

@@ -16,7 +16,7 @@
     pname = "usbguard-tui";
     version = "1.0.0";
 
-    ldflags = ["-s" "-w"];
+    ldflags = ["-s" "-w" "-X main.version=${version}"];
   in {
     packages = forAllSystems (system: pkgs: {
       "${pname}" = pkgs.buildGoModule {

main.go

@@ -9,7 +9,14 @@ import (
 	"github.com/anotherhadi/usbguard-tui/internal/ui"
 )
 
+var version = "dev"
+
 func main() {
+	if len(os.Args) > 1 && (os.Args[1] == "--version" || os.Args[1] == "-version" || os.Args[1] == "-v") {
+		fmt.Println("usbguard-tui", version)
+		return
+	}
+
 	if err := guard.Check(); err != nil {
 		fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)