feat: add direct links download functionality

- Implemented a new task type for handling direct links downloads.
- Added command handler for downloading multiple links via /dl command.
- Introduced progress tracking for direct link downloads.
- Enhanced filename parsing to support various encoding scenarios.
- Updated enums to include direct links as a task type.
- Refactored existing task structures to accommodate new functionality.
- Improved error handling and logging throughout the download process.

common/utils/ioutil/writer.go

@@ -1,6 +1,8 @@
 package ioutil
 
-import "io"
+import (
+	"io"
+)
 
 type ProgressWriterAt struct {
 	wrAt    io.WriterAt
@@ -46,4 +48,4 @@ func NewProgressWriter(
 		wr:      wr,
 		onWrite: onWrite,
 	}
-}
+}