#91 add css rules for search results component relating to filter bar

[kevin-mitchell]

This PR adds a new CSS file and the required clientlibs wiring required to provide some very basic / lightweight styling to new search results related html elements.

I made an attempt to stick with the basic structure / design of existing elements and the new CSS rules attempt to leave the basic look and feel of all elements on the page untouched.

Note that this PR only makes sense in the context of another PR being made against the aem-core-cif-components repo, though the changes should be reasonably safe independently.

Related Issue

91

Motivation and Context

This PR adds a new CSS file and the required clientlibs wiring required to provide some very basic / lightweight styling to new search results related html elements.

How Has This Been Tested?

Testing was performed by building the (upcoming) changes to the aem-core-cif-components stemming from this issue.

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] 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.
• [ ] I ran all tests locally and they pass.