fix(api-service): move workflow dto from shared to api

[tatarco]

Resolve Workflow DTO Issues

What changed? Why was the change needed?

DTO Migration and Enhancements

• All DTOs were moved from shared into API, converted to classes, and assigned the correct OpenAPI decorators.
• All of the workflow V2 DTOs are now generated under the @novu-api. All of our E2E tests are now using the SDK and dogfooding the OpenAPI structure.
• Error DTOs have been enhanced due to issues found in implementation.
• Class validators are now working on DTOs, enforcing bad data from getting into the service.
• The filter has been updated to parse those errors elegantly as well.
• Decoupled the interfaces created in shared from entities; they should not be used anymore. We generate DTOs now, and the client should not care about our database entity; all is clearly presented to him.
• JSON schema was a complete mess; aligned it all the way to the DAL layer. Some as unknown had to be added in the framework to minimize scope.
• The preference controller has been deprecated along with all its DTOs since naming was a big confusion and duplication. Deprecated them all in order to know what is new and what is old.
• Separated DTOs into separate properly named files.

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Related enterprise PR

Special notes for your reviewer

[linear]

NV-5295 Align Workflow Controller to SDK

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