Support TD-DFT calculations in ORCA

[RaphaelRobidas]

Description of the desired feature TD-DFT calculations can be used to calculate UV-Vis spectra. This feature is supported in Gaussian, but not in ORCA.

Relevant documentation or examples Refer to the ORCA manual in the download section of the forums (https://orcaforum.kofo.mpg.de/app.php/portal)