feat: Add drill-in component with error/changed badges and navigation breadcrumbs #474

Description

Add a drill-in component for nested form fields that displays error and changed status badges, along with navigation breadcrumbs showing the field path hierarchy when drilling into nested fields.

Motivation

Form fields can nest up to 8 levels deep, creating a complex and overwhelming user experience. Without a drill-in component, users are confronted with all nested options simultaneously, resulting in an excessively long form in the side panel that is difficult to navigate and understand. The drill-in component provides a clean, focused UX by allowing users to progressively explore nested structures one level at a time, improving form usability

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.