Rework tests, and move all source files into main package

src/main.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"log"
 	"os"
-	"router_backup/config"
 
 	"github.com/spf13/cobra"
 )
@@ -38,7 +37,7 @@ func main() {
 			fmt.Printf("IPng Networks Router Backup v%s\n", Version)
 
 			// Load configuration
-			cfg, err := config.ConfigRead(yamlFiles)
+			cfg, err := ConfigRead(yamlFiles)
 			if err != nil {
 				log.Fatalf("Failed to load config: %v", err)
 			}
@@ -63,7 +62,7 @@ func main() {
 			// Filter devices if --host flags are provided
 			devicesToProcess := cfg.Devices
 			if len(hostFilter) > 0 {
-				devicesToProcess = make(map[string]config.Device)
+				devicesToProcess = make(map[string]Device)
 				for _, hostname := range hostFilter {
 					if deviceConfig, exists := cfg.Devices[hostname]; exists {
 						devicesToProcess[hostname] = deviceConfig