Third deliverable/karen rodriguez

[kleyla]

Description

Create the Provider for the Global Context and useReducer used. Theming added.
Preview URL: https://kleyla.github.io/react-certification-2021/

Type of Changes

	Type
	🐛 Bug fix
✓	✨ New feature
	🔨 Refactoring
✓	💯 Add tests
	🔗 Update dependencies
	📜 Docs

[cylcrow]

@kleyla, what an amazing job. 🌟

Keep working that way until the end of the bootcamp! 💪🏼 💯

Acceptance Criteria

• The search term is stored and retrieved from the Global Context correctly.
• The appearance theme is stored on the Global Context and applied correctly to the App UI.
• useReducer hook is implemented correctly to manage the Global State.

Bonus Points

• Testing coverage is above 70%. (Please include a screenshot of the code coverage report in your PR description).