Add Setting to Revert Scaffolding CSS to PascalCase (#365)

[bstaruk]

This PR adds a new array of options to fc-config.js called codeStyle.

This array will be used to house code style options that are used in the build/scaffolding processes, starting with pascalClassNames.

pascalClassNames defaults to false, but when this is switched to true the FC scaffolding tasks will use PascalCase for the CSS class names on newly-generated atoms/molecules/organisms/modifiers.

This option will not change the baseline components and only affects new ones. The reason for this is to keep things simple and maintainable, while improving backwards-compatibility with components that may have been generated with PascalCase class names with older versions of FC.

See #365 for more information and context.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)