Add /.cache to .gitignore
Add /.cache to .gitignore

This directory is generated by pytest (I believe the pytest-xdist
extension).

meng-sun/hil,henn/hil,henn/hil_sahil,kylehogan/hil,SahilTikale/haas,henn/haas,henn/hil_sahil,CCI-MOC/haas,meng-sun/hil,kylehogan/hil,kylehogan/haas,henn/hil