[Feature Request] check study and assay identifier for unsupported characters

[bvenn]

Is your feature request related to a problem? Please describe.

When accidentally adding parenthesis to study identifier - and maybe others - the respective folder cannot be created because forbidden characters are within the file path. The study/assay identifier should be checked for these and either remove them or inform the user to fix the identifier.
This is important because before the folder structure is created it seems as if the registration of the study/assay is performed prior of the error seen below, and therefore some commands are processed and some fail.