Apologies for the shamefully incomplete README.
You can access the published extension at: https://chrome.google.com/webstore/detail/nekudot/lifcgpfijhjloceldomdfbkjghkdnenk
To setup locally install the requirements:
npm i
Then create the compiled code:
npm run build
Finally install the package by following these instructions: https://webkul.com/blog/how-to-install-the-unpacked-extension-in-chrome/
Use the dist/ folder as the source.