chore(atomic): migrate atomic-insight-refine-toggle to Lit

[Copilot]

✅ Checklist

• 🧪 The component is unit tested
• 🧪 The component includes E2E tests
• 🗑️ Old Cypress tests exclusive to the component are removed
• 📖 The component is documented in storybook with an .mdx file
• ♿ The component complies with the Web Content Accessibility Guidelines.
• 🌐 All strings intended for humans or assistive technology must be localized with i18n.
• 📦 The Lit component is exported in the appropriate index.ts and lazy-index.ts files.
• 🎨 CSS parts are documented still accessible.
• 🦥 Slotted Content, public methods and properties are documented
• 🔄 The component outputs the same Angular output as before with Stencil
• 🏷️ The component declares the component type in the HTMLElementTagNameMap

https://coveord.atlassian.net/browse/KIT-4876

[Copilot]

Pull request overview

This PR migrates the atomic-insight-refine-toggle component from Stencil (.tsx) to Lit (.ts), aligning with the new Atomic component architecture. The component displays a button that opens a modal containing facets and sort components, and automatically creates an atomic-insight-refine-modal when added to the interface.

Key Changes:

• Complete rewrite using Lit framework with decorators (@customElement, @bindings, @withTailwindStyles)
• Simplified implementation by leveraging shared utilities (renderRefineToggleButton, refineToggleGuard)
• Added comprehensive unit tests following Vitest conventions
• Added Playwright E2E tests and proper Storybook documentation
• Removed legacy Stencil-specific code and Cypress tests

Reviewed changes

Copilot reviewed 14 out of 15 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
atomic-insight-refine-toggle.ts	New Lit component implementation with proper decorators and lifecycle methods
atomic-insight-refine-toggle.spec.ts	Comprehensive unit tests covering controller initialization, rendering states, and user interactions
e2e/atomic-insight-refine-toggle.e2e.ts	Playwright E2E tests for button visibility and accessibility
e2e/page-object.ts	Page object pattern for E2E test abstraction
e2e/fixture.ts	Test fixture setup for Playwright tests
atomic-insight-refine-toggle.new.stories.tsx	Storybook story with proper configuration and facet integration
atomic-insight-refine-toggle.mdx	Complete documentation explaining usage and facet management
search-status-controller.ts	New test utility for mocking SearchStatus controller
index.ts, lazy-index.ts	Component exports added for proper module exposure
custom-element-tags.ts	Component tag registered for internal tracking
components.d.ts	Stencil type definitions removed (replaced by Lit's global interface)
insight-panel.cypress.ts	Legacy Cypress test removed as component now has Playwright tests

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