The FOSS variants of VSCode, such as VScodium or Code-OSS, are not allowed to access the extension marketplace directly within the program (thanks Microsoft). Since Microsoft blocks that, the next best thing was to just go to the extension's page on VS Marketplace, and hit the nice big "Download" button. Recently, however, Microsoft realized they were being far too kind to us open source users, so they decide to remove the download button and leave us to figure out ourselves (thanks again, Microsoft).
There are a number of guides like this scattered online, but most of them are outdated, and none of them provide a convenient, automated way to do it. While I wrote this script myself, I originally intended to host it on a website, but