ci: add test preparation

cmd/cbzoptimizer/main.go

@@ -1,3 +1,5 @@
+//go:build ignore
+
 package main
 
 import (

cmd/test-setup/main.go

@@ -0,0 +1,19 @@
+//go:build testsetup
+// +build testsetup
+
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/belphemur/CBZOptimizer/v2/pkg/converter/webp"
+)
+
+func main() {
+	fmt.Println("Setting up WebP encoder for tests...")
+	if err := webp.PrepareEncoder(); err != nil {
+		log.Fatalf("Failed to prepare WebP encoder: %v", err)
+	}
+	fmt.Println("WebP encoder setup complete.")
+}