CoreLogger should throw an exception instead of calling trigger_error with E_USER_ERROR

[jsavell]

PHP 8.4 deprecates the strategy of triggering an error by calling trigger_error with the E_USER_ERROR constant.

Pipit log levels of 3 should be updated to throw RuntimeException or a custom extension of it at https://github.com/TAMULib/Pipit/blob/master/src/Pipit/Classes/Loggers/CoreLogger.php#L45 rather than the current trigger_error call. The exception message should be populated with the $message variable.

The trigger_error call can be left in place for the other Pipit logger levels.

This change should be backward compatible, as the exception+message will be written to the log and execution halted, the same behavior previously accomplished with trigger_error.