Bad format doesn't contain a lot of info

[labsin]

Describe the bug
If a conversion in the constructor of a datatype throws an error, only a very generic error is available:

Option 'some option' is defined with a bad format.

To Reproduce

• Have a property of type DirectoryInfo
• Supply bad character (mostly happens by accident)
• Get general error

Expected behavior
There are some options:

1. Add the used parameter to the BadFormatConversionError type so the bad formatted input string can be shown in the custom help callback.
2. Catch TargetInvocationException and add the inner exception to the BadFormatConversionError
3. Show a message with the message of the exception, especially when the exception is an ArgumentException.
   It would then read something like 'Option 'i, input' is defined with "Invalid;Path" which is a bad format: Illegal characters in path.'

[labsin]

Relates to #113

[labsin]

BTW, the initial problem was #226, which I had to debug to see the actual thing that went wrong.