CO2 emissions score and layout improvements

AddedChanged

Lots of layout updates and environmental impact of a web page now calculated and displayed in the footer.

New features

  • CO2 emmisions page score, based on data from Beacon
  • New utility classes for grid, margin, padding and border
  • Added Badge component

Bug fixes & improvements

  • Homepage layout now 2 column on desktop
  • Improved heading sizes and spacing
  • Footer now feels more like a footer
  • Inline code now highlighted
  • Added missing ::selection style
  • Changelog layout now utility classes