Address feedback: path aliases and restore attributes-slot Vitest spec

[Copilot]

Addresses review feedback from #7168: fixes relative imports that cross directory boundaries (should use @/ path aliases) and restores test coverage for attributes-slot.ts which was deleted but the module is still in use.

Changes

• attributes-slot.spec.ts — Re-created as a Vitest unit test (9 tests) covering getAttributesFromLinkSlotContent: empty/non-anchor slots, attribute filtering (slot, href), multi-element warnings, and first-element selection
• Path alias fixes in three files:
  • bindings-context.ts: '../interface/bindings' → '@/src/components/common/interface/bindings'
  • bindings.ts: two relative cross-directory imports → @/src/components/common/...
  • accessibility-utils.ts: two relative cross-directory imports → @/src/components/common/...

✅ 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

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