feat(tables): add isSticky prop to Head component

[Francois-Esquire]

Description

Adds isSticky prop to Head component for react-tables package.

Detail

Example usage preview:

Checklist

• 👌 design updates will be Garden Designer approved (add the designer as a reviewer)
• 🌐 demo is up-to-date (yarn start)
• ⬅️ renders as expected with reversed (RTL) direction
• 🤘 renders as expected with Bedrock CSS (?bedrock)
• 💂‍♂️ includes new unit tests. Maintain existing coverage (always >= 96%)
• ♿ tested for WCAG 2.1 AA accessibility compliance
• 📝 tested in Chrome, Firefox, Safari, and Edge

[coveralls]

Coverage increased (+0.002%) to 96.106% when pulling e713a10 on jzempel/sticky-table-header into 5157937 on main.