child_process + Build: rename exec to run + all related code
Justification: exec, execv etc are unix concepts and portable version
should be called differently.
Do no touch non-Zig code. Adjust error names as well, if associated.
Closes #5853.
fd2239bde9Jan Philipp Hafer committed on 10/22/2023, 6:47:20 PM· committed by Andrew Kelleyparentd8c0679