feat: Remove yaml-language-server override after Volar update #523

Description

Remove the temporary yaml-language-server@1.24.0 override introduced in #522 after upgrading to a compatible volar-service-yaml release.

Parent tracking issue: #289.

Motivation

volar-service-yaml@0.0.71 still depends on yaml-language-server~1.23.0. In #522, OWS Editor overrides this dependency to 1.24.0 to use the newer YAML Language Server without pulling in the outdated vscode-json-languageservice v4 dependency.

Upstream volarjs/services#127 updates the dependency to ~1.24.0, but is not merged/released yet. We should remove the workaround once the official dependency is available.

Proposed Implementation

• Wait for volarjs/services#127 to be merged and a compatible volar-service-yaml version to be published.
• Upgrade volar-service-yaml in pnpm-workspace.yaml and update the lockfile.
• Remove the temporary yaml-language-server: "1.24.0" override and its comment.
• Verify YAML completions, diagnostics, hover, and the Create an Open Workflow CodeLens, as well as existing JSON functionality.
• Run the relevant unit tests, production builds, and Playwright E2E tests.

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.

References

• feat: Scaffold the language-service workspace package #289
• feat #322: Implement volar-service-yaml for YAML language support #522
• feat: update yaml-language-server to 1.24 volarjs/services#127