This is the repo that creates the site you are looking at currently. So if you are interested in the technical background, this is the project you were looking for.
This repo contains all posts at dev.to.
Download all of your tweets including its' attached images with just one function call.
npm install -D tweet-downloader
Ensure that you have a Twitter Developer account an created an app. You will need the credentials.
getLatestTweets("1", "KackDev", "./images", ....)
If you want all tweets, just pass "1" here. "0" will not work.