I found https://github.com/koosoli/ESPHomeDesigner before Christmas and it seemed to be a really nice tool so decided to try it out. And soon I was contributing some. Here is some notes from that.
cd /tmp
git clone https://github.com/koosoli/ESPHomeDesigner.git
cd ESPHomeDesigner
git switch testing
git pull
cp -r custom_components/esphome_designer /homeassistant/custom_components