Rename all React components from `index.jsx`
Using `index.jsx` for all React components, sometimes makes it difficult
to find it when searching by name, even though the parent folder name is
the component name.
Instead of `index.jsx`, `[component_name].jsx` is now used. But, this
also means that a `package.json` file must be created for each
component, so that the import statements stay the same.
Without the extra `package.json` file, the import would have to be
changed from something like: `import TextInput from './TextInput'` to
something like: `import TextInput from './TextInput/TextInput'`. The
`package.json` files allows the first version of the import statement to
remain unchanged.