ParamConverter should throw UserFriendlyException

[slominskir]

In order to satisfy CodeQL Exception messages cannot be shared with users unless explicitly overridden, which the UserFriendlyException class does. Therefore the ParamConverter class should throw UserFriendlyExceptions instead of built-in Exceptions such as IllegalArgumentException in order to better support delivering user friendly messages to the user without tripping security scanners.

Related: #23