chore(atomic): Prepare atomic-quickview-sidebar to migration to Lit

[lavoiesl]

Work for #6389
https://coveord.atlassian.net/browse/KIT-4982

This is a PR in preparation to the migration to Lit: #6662
I decided to do it separately because the PR was already big and I wanted to make sure my changes were still passing all CI.

• Rename files to stencil-
• Split into multiple files
• Remove the use of <Fragment>.
  • It's just a Stencil compile time helper.
  • Fragment is not supported when invoking Stencil from Vitest.
  • Returning an array does the same thing.
• Add more support in renderStencilVNode:
  • Array of nodes as input
  • Event listeners
  • htmlFor, which resolves to the for attribute.
• Generate unit tests.

[github-actions]

🔗 Scratch Orgs ready to test this PR:

• ✅ LWS Enabled: Open Org
• ✅ LWS Disabled: Open Org

[alexprudhomme]

Lgtm 👍

[Copilot]

Pull request overview

This PR prepares the atomic-quickview-sidebar component for migration to Lit by refactoring the Stencil functional component structure. The changes maintain existing functionality while adhering to patterns that will support the upcoming Lit migration.

Key changes:

• Enhanced renderStencilVNode test utility to support arrays, event listeners, htmlFor attribute mapping, and boolean attributes
• Split monolithic component into focused, testable functional components with stencil- prefixes
• Replaced Fragment with array returns for Vitest compatibility
• Generated comprehensive unit tests for all functional components

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
vitest-utils/testing-helpers/stencil-vnode-renderer.ts	Added support for array rendering, event listeners (onClick, etc.), htmlFor attribute conversion, and boolean attributes to enable testing of split functional components
atomic-quickview-sidebar/stencil-minimize-button.tsx	Extracted minimize button logic into standalone functional component
atomic-quickview-sidebar/stencil-minimize-button.spec.ts	Added unit tests covering button rendering, event handling, and conditional badge display
atomic-quickview-sidebar/stencil-keywords.tsx	Extracted keywords list rendering; replaced Fragment with array return pattern
atomic-quickview-sidebar/stencil-keywords.spec.ts	Added tests for keyword rendering, navigation callbacks, highlight toggling, and disabled states
atomic-quickview-sidebar/stencil-highlight-keywords-checkbox.tsx	Extracted checkbox component; uses array return for conditional label rendering
atomic-quickview-sidebar/stencil-highlight-keywords-checkbox.spec.ts	Added tests for checkbox state management and conditional label visibility
atomic-quickview-sidebar/stencil-atomic-quickview-sidebar.tsx	Main component now orchestrates extracted child components; marked as deprecated for Stencil-only use
atomic-quickview-sidebar/stencil-atomic-quickview-sidebar.spec.ts	Added integration tests for component composition and state propagation
atomic-quickview-modal/atomic-quickview-modal.tsx	Updated import path to reference renamed stencil-atomic-quickview-sidebar file

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