I still haven’t gotten around to doing this, but check out this video!
With this, you could effectively still just compile via command line if you wanted to… however if you are going through the trouble you might as well take advantage of the IDE.
The Core-Firmware readme is also very useful to double check things that you are doing: device-os/README.md at master · particle-iot/device-os · GitHub
You should also know some basic GIT/GITHUB type stuff, or just grab the Download Zip’s for each Repo if you just want to grab this one version of firmware.