refactor: update file handling to use new downloader interface; remove unused tdler package

pkg/tfile/dler.go

@@ -0,0 +1,17 @@
+package tfile
+
+import (
+	"github.com/gotd/td/telegram/downloader"
+	"github.com/krau/SaveAny-Bot/common/utils/dlutil"
+	"github.com/krau/SaveAny-Bot/config"
+	"github.com/krau/SaveAny-Bot/pkg/consts/tglimit"
+)
+
+type DlerClient interface {
+	downloader.Client
+}
+
+func NewDownloader(file TGFile) *downloader.Builder {
+	return downloader.NewDownloader().WithPartSize(tglimit.MaxPartSize).
+		Download(file.Dler(), file.Location()).WithThreads(dlutil.BestThreads(file.Size(), config.Cfg.Threads))
+}