New: Improve Manual Import logging when not parsing files

Closes #8059

(cherry picked from commit 83f63590630ae0728fd9f9f03567a294934eebcc)

src/NzbDrone.Core/MediaFiles/MovieImport/Manual/ManualImportService.cs

@@ -156,6 +156,8 @@ private List<ManualImportItem> ProcessFolder(string rootFolder, string baseFolde
 
                 if (files.Count() > 100)
                 {
+                    _logger.Warn("Unable to determine movie from folder name and found more than 100 files. Skipping parsing");
+
                     return ProcessDownloadDirectory(rootFolder, files);
                 }