Restructuring of yoast-components

[atimmer]

We need to restructure yoast-components

Decisions

• API will be import { Button } from "@yoast/components"
• API for complex composites will be `import { SnippetPreview } from "@yoast/preview-components" / "@yoast/metadata-previews"
• No css folder
• No redux folder
• We'll have a packages/components folder. (Moving to the mono-repo structure)

Todos

Do the restructure

• Move all current components to the new folder structure.

Remaining todos

• Consolidate all the different buttons into one stack of buttons.
• (Maybe?) Refactor determineFacebookImageProperties.js into separate files.

We want to inspect the following components:

• Input
• Label
• Progressbar
• Section
• StyledSection
• Textarea
• Textfield
• Icon

We need to change the following things:

• DismissButton should inherit from Button.