feat: restructure code; add size and ext checks (#39)

- Refractor code
- Add file size and extension checkers
- Change repair workflow to use zurg

pkg/qbit/shared/utils.go

@@ -1,8 +1,8 @@
 package shared
 
 import (
-	"github.com/sirrobot01/debrid-blackhole/common"
 	"github.com/sirrobot01/debrid-blackhole/pkg/debrid"
+	"os"
 	"path/filepath"
 	"sync"
 	"time"
@@ -16,7 +16,8 @@ func checkFileLoop(wg *sync.WaitGroup, dir string, file debrid.TorrentFile, read
 	for {
 		select {
 		case <-ticker.C:
-			if common.FileReady(path) {
+			_, err := os.Stat(path)
+			if !os.IsNotExist(err) {
 				ready <- file
 				return
 			}