fixed interval transform and refactored some code

refactor: code clean up

fix: array was copied as a reference

refactor: renamed dome methods and cleaned up

feat: IntervalTransform for List<RollResult>

fix: abandoned fractions in favor of decimal

refactor: created util class for operations on dice

feat: new roll methods

feat: made fractions being used only under the hood

fix: fixed a bug with negative fractions

Precision fixes.

Precision fixes.

Finally calculating probabilities. Full concept refactoring: every roll result is calculated as a combination of simple roll results. Added result summ and result transform functions. Added tests for everything.

Added ToString() methods for Dice and DicePool. Added a test for Dice.ToString() method.

Implemented IEnumerable for DicePool class.