Update React.md

[sbatur18]

Added a hands-on tutorial for starting a React project. Added brief information on two useful libraries (Formik, Styled Components)

[groovytwoshoes]

Thank you for your contribution! The pull request adds valuable information on starting a React project, and succinctly introduces two useful libraries (Formik and Styled Components) along with their installation instructions and links to video guides.

Your writing style is friendly and easy to read, with clear steps provided, making it an enjoyable experience for students to follow along. The content adheres well to the guidelines, is well-organized, with clear headings and subheadings, and provides external links to related resources.

One minor suggestion would be to consider using a subheading for each of the two libraries (under the “Useful Libraries” section) rather than enumerating them in order to improve readability and organization.

Again, great job. This is very well presented!