File upload support along with message

[tarunKoyalwar]

Please describe your feature request:

• a feature where we can upload file and also add a message along with it would be great since it makes things simple and avoids splitting out data and all major providers such as slack , discord preview file

Describe the use case of this feature:

[szybnev]

Very useful feature

[dogancanbakir]

Duplicate of https://github.com/projectdiscovery/notify/issues/207