Add theme linkbox

[deltronik]

After you have read the instructions for adding a theme, please make sure:

• [ . ] your theme.toml is complete
  • [ . ] name
  • [ . ] license
  • [ . ] licenselink
  • [ . ] description
  • [x] homepage
  • [ . ] demosite (if one exists)
  • [ . ] tags
  • [ . ] features
  • [ . ] authors/author (depending on whether the theme has multiple or a single author)
  • [ . ] original (if the theme is a fork)
• [ . ] you're using absolute paths for images in your README
• [ . ] you've got appropriate thumbnail and screenshot images
• [.] your theme comes with an appropriate license

[netlify[bot]]

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