I'd like to complete the whodunit using CS50 IDE. Is there a way to use wget to get the files from WHODUNIT so i can work on them?
I did that before. The sources for the lab are at https://github.com/cs50/labs/tree/2019/x/whodunit.
Make a new directory, open a terminal there, then execute
wget https://raw.githubusercontent.com/cs50/labs/2019/x/whodunit/bmp.h wget https://raw.githubusercontent.com/cs50/labs/2019/x/whodunit/clue.bmp wget https://raw.githubusercontent.com/cs50/labs/2019/x/whodunit/copy.c wget https://raw.githubusercontent.com/cs50/labs/2019/x/whodunit/questions.md
Should be all you need. For your own files created/changed in the lab, I'd copy&paste their content.