[BUG] forward the single of group item

[saturn99]

Describe the bug
If we want to forward only one file from a group of files, tdl will download all files as a group and then forward it.

To Reproduce
In this channel, we have group items including 3 files

• https://t.me/TDLTDLTEST/2 file1
• https://t.me/TDLTDLTEST/3 file2
• https://t.me/TDLTDLTEST/4 file3

I want to forward only file 2 with URL https://t.me/TDLTDLTEST/3

If I run this command:
./tdl forward -n xxx --from "https://t.me/TDLTDLTEST/3"
All files in the group will be sent

Expected behavior
i expected forward command work similar

./tdl dl -n xxx -t 1  -u "https://t.me/TDLTDLTEST/3" 
./tdl up -n xxx -c "---" -p downloads/ 

Version:

Version: 0.15.1
Commit: 1e605a0
Date: 2024-01-31T14:13:25Z

go1.19.13 linux/amd64

Additional context

in Telegram, these addresses refer to a group item

• https://t.me/TDLTDLTEST/2 file1
• https://t.me/TDLTDLTEST/3 file2
• https://t.me/TDLTDLTEST/4 file3

And Telegram itself uses the ?single parameters to separate this item

• https://t.me/TDLTDLTEST/2?single file1
• https://t.me/TDLTDLTEST/3?single file2
• https://t.me/TDLTDLTEST/4?single file3

As a result, this method can be used to clarify whether the user intends to download a single file or the entire group

[iyear]

Accepted. tdl will auto detect grouped message and forward all of them. I will add a flag to allow user to forward a single message.