Update the SectionList component

[ani4aniket]

• Copy the title and prop descriptions from react-native-website docs to comments in Switch.js.
• Decide if links should be relative or absolute.
• Defining the default values of the props.
• New approach to show inherited props
• Showing repeated links within the component. Eg: color
• Remove unused comment in code.
• Parse special constants section
• Parse methods and their parameters.