Introduce Enum Reflection

This MR is modeled after allpix-squared/allpix-squared!483 (merged)

This MR adds the Magic Enum class to allow for enum reflection. An overload of corryvreckan::to_string_impl() and corryvreckan::from_string_impl() for enum types enable parsing configuration keys directly into enums:

enum class FileType {
    ROOT,
    TXT,
    CSV,
};

auto model = config.get<FileType>("file_type");
if(model == FileType::ROOT) {
    // do sth
}

without odd string comparisons. If the requested key does not exist in the enum, an error message with all available options is printed, emulating the behavior of the manual else printouts used in string comparisons so far:

|23:08:27.240|   (FATAL) [C:SomeModule:dut] Error in the configuration:
                                            Could not convert value '"spock"' from key 'model' in section 'SomeModule' to type SomeModule::DepositionModel: invalid value, possible values are: mine, yours, theirs
                                            The configuration needs to be updated. Cannot continue.