Feature: Support of inline Attachements when using novu framework

Feature description

Allow sending inline attachments disposition: 'inline' & cid: 'XXX'

Why is this feature needed ?

This would allow us to provide custom emails using the framework lib and provide inline files for icons etc.

✌️ How do you aim to achieve this?

additional property for email step, where inline attachements could be provided.

️ Additional Information

No response

Have you spent some time to check if this feature request has been raised before?

• I checked and didn't find similar issue

Have you read the Code of Conduct?

• I have read the Contributing Guidelines

Are you willing to submit PR?

No response