visualization follow up

[joshkamm]

• How to allow for the user to run something like crest for the ancillary ligand and provide their own conformers that way (on optionally integrate crest)
• Something to make it easier to play through the nodes of a string (e.g. buttons like molden, keyboard shortcut)
• Enable visualization to explore structures from which a transition state came (energy for filtered structures set to 200+index)
• Extract trajectory from ASE and visualize with molstar