Add Support for Email Receiving

[thejemish]

Currently, the system supports sending emails but does not handle incoming messages. Please add functionality for receiving emails, including parsing, storing, and making them accessible through the UI or API.

Acceptance Criteria:

• System can receive incoming emails
• Emails are parsed and stored correctly
• Received emails are accessible via UI/API
• Basic error handling for failed or malformed messages

[KMKoushik]

this is in the roadmap