Menu component rewrite

[callinmullaney]

Summary

This PR rewrites the menu component and example main/footer menu components. It features:

• Storybook controls!
• basic styles for menu toggles and menu level toggles
• Simplified way to embed/extends the base component for any menu
• Accessibility enhancements
• Simple menuToggle js file that handles the open/close menu functionality as well as the level navigation toggles

Documentation Update (required)

None at this time.

Notes:

• Compound is an external repository for the CLI that meant to house basic components. They are a starting point for any Emulsify-base project.

How to review this PR

• [x] TBD - Create a standalone Emulsify Project
• [x] TBD - Change your CLI config file to point to this branch as it's components base.
• [x] TBD - Run CLI command and pull down the menu component from this branch/PR
• [ ] TDB - Run npm run develop and verify there are no initial build errors
• [ ] Go to Molecules/Menu and verify there is a basic menu structure available.
• [ ] Verify the Storybook controls adjust the layout, alignment, and menu toggles respectively.
• [ ] Review the Markup and class structure and verify items are properly labeled.
• [ ] Review the main menu at Organisms/Menus/Main
• [ ] Review the footer menu at Organisms/Menus/Footer