Remove KResponsiveWindowMixin

[AlexVelezLl]

Description

Removes KResponsiveWindowMixin and all remaining references in docs.

Issue addressed

Addresses #679

Changelog

• 719
  • Description: Removes KResponsiveWindowMixin.
  • Products impact: removed API.
  • Addresses: Remove KResponsiveWindowMixin #679.
  • Components: KResponsiveWindowMixin.
  • Breaking: yes.
  • Impacts a11y: no.
  • Guidance: Replace any use of KResponsiveWindowMixin with the new composable useKResponsiveWindow.

Steps to test

Is there still a reference to KResponsiveWindowMixin somewhere?

Testing checklist

• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical and brittle code paths are covered by unit tests
• The change is described in the changelog section above

Reviewer guidance

• Is the code clean and well-commented?
• Are there tests for this change?
• Are all UI components LTR and RTL compliant (if applicable)?
• Add other things to check for here

After review

• The changelog item has been pasted to the CHANGELOG.md

Comments

[AllanOXDi]

LGTM! Thanks @AlexVelezLl

[AlexVelezLl]

Thank you @AllanOXDi!!