Enhance CommunicationStudio.exe with Digital Signature

The current version of CommunicationStudio.exe does not provide the ability to digitally sign, which is a crucial feature for ensuring authenticity and security in electronic communication.

As per our requirements, we need to integrate digital signature support into CommunicationStudio.exe to. This will enhance the overall security and trustworthiness of the platform, especially for business-to-business (B2B) and enterprise customers.