Task: Publish MVP package #266

Description

Publish @openworkflow/diagram-editor as a new npm package under the renamed org scope. Configure npm Trusted Publishing (OIDC) for the new package and confirm first release matches the current diagram-editor version/feature set.

Motivation

Completes the scope migration from @serverlessworkflow to @openworkflow

Proposed Implementation

No response

Definition of Done

• Implementation: Fully implemented according to the Open Workflow spec.
• Unit Tests: Comprehensive unit tests are included and passing.
• Integration Tests: Verified within the monorepo and target environments (Web/VS Code).
• Documentation: Updated README.md, ADRs, or official docs.
• Performance: No significant regression in editor responsiveness.
• Accessibility: UI changes comply with accessibility standards.