v2111

Second pre-release with:

• Add berlin.de libraries
• Add berlin.de platform header and footer with additional styling
• Add berlin.de breadcrumb nav
• HomePage - add hero, additional blocks and clean up existing ones
• Teaser blocks added for all page types
• Refactr of file names and classes
• Update of grunbuch styling
• Updates including linting
• Add a11y info to nav with setting for contact details
• Add translatable fields
• Add translations
• Add participation and contact form
• Styling of simple page
• Refactor of wagtail fields and page tree
• Logos
• Caption to images
• Styling Overview page
• Refactor titles
• refactor styles with the introduction of berlin.de libraries