Fix LinkExternal implementation

• Fix LinkExternal implementation
• Change visited color to correct token
• Create variant-prop for Link component, was only using static method

Create TextInput, SearchInput and LinkExternal components

• Create TextInput component
• Create SearchInput component
• Create LinkExternal component
• Refactor styleguidist.sections
• Replace HTMLAttributes typings with HTMLProps (https://github.com/piotrwitek/react-redux-typescript-guide\#reacthtmlpropshtmlxxxelement)

Update color tokens and fix font-weights

• Add color token accentTertiary and accentTertiaryDark9
• Add font-weight 300 to be loaded as used with Heading.h1
• Create deploy for develop (dev)

Update Styleguidist and organize styleguide and component presentations

• Update React-Styleguidist
• Add depthSecondaryDark3 and depthLight26 color tokens
• Present interfaces for components that are part of a presentation of another component section
• Use Google Webfont's new feature to set display:swap with query param
• Remove not needed global box-sizing breaking the styleguide text editor layout
• Replace require with import in styleguidist (now supporting it)
• Hide plain Menu component that has no design in suomifi

List all icons in styleguide

• List all icons in styleguide

Add spacing tokens

• Add support for static icons
• Add spacing tokens
• Introduce typography-components

Create typography tokens

• Create typography tokens
• Create Text and Heading components
• Install and configure stylelint for CSS-in-JS
• Update tests

Button component fixes

• Add missing KeyboardEvent to Button onClick
• Fix unstyled Button

Create color tokens

• Create color tokens
• Introduce colors grouped by types

Breadcrumb component

• Breadcrumb component
• Fix PanelExpansion styles