Include Limestone styles

[nrsa222]

Limestone is the University's pattern library that adheres to UK Brand standards and guidelines. A demo of the components can be found in Pattern Lab and Limestone CSS v1.0.0 is available on webcdn.uky.edu.

Acceptance Criteria:

• Include Limestone v1.0.0 styles in ExploreUK web app served from webCDN
• Rework ExploreUK html markup to make use of Limestone styles
• Fix conflicting style rules between current EUK web app, bootstrap and Limestone styles. Limestone styles should take precedence as possible
• Ensure no new WCAG 2.1 violations are introduced