Chore: Email Feature Exception Handling to Global Exception Handling

[Am0du]

Description:
Currently, the exception handling for the email feature is implemented in a specific class. To promote code reusability and maintainability, we need to refactor the exception handling logic for the email feature into a global exception handler.

Acceptance Criteria:=

• Refactor existing email feature exceptions to be handled by the global exception handler.
• Ensure the global exception handler returns a consistent ErrorResponseDto.
• Update all relevant tests to reflect the changes.

Error Handling:
Ensure that all exceptions related to the email feature are caught by the global exception handler. The global exception handler should return a well-structured ErrorResponseDto with appropriate error messages, error types, and status codes.

Purpose:
This refactor will ensure that exceptions across the application are handled consistently, reducing duplication and improving code maintainability.

Expected Outcome:
Exceptions related to the email feature should be handled by the global exception handler, which should return a standardized error response.