CIF-1355 - MVP Faceted Search - Styling

[dplaton]

Description

Implement styling for the search facets. The styles are inspired by the Venia concept. Merge / verify together with the PR from the aem-core-cif-components project: https://github.com/adobe/aem-core-cif-components/pull/257

Related Issue

CIF-1355

Motivation and Context

Align the styling of the search facets with the overall style of the site.

How Has This Been Tested?

Functional testing

Screenshots (if appropriate):

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] I have signed the Adobe Open Source CLA.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes and the overall coverage did not decrease.
• [ ] All unit tests pass on CircleCi.
• [x] I ran all tests locally and they pass.