New dataset categories: combinatorics, statistics, optimization, and
formal languages. Extended existing algebra, arithmetic, probability,
logic, and graphs packages with complex_advanced, linear_algebra, limits,
number_theory, conditional_probability, set_operations, and job_scheduling.
Each dataset includes config validation, deterministic seeding, custom
scoring, curriculum support, and comprehensive unit tests (92 new tests).
* Add polynomial multiplication curriculum and unit tests
* Add difficulty metadata
* Add curriculum class for complex_arithmetic and polynomial_multiplication
This commit introduces a new dataset for complex number arithmetic operations:
- Implements ComplexArithmeticDataset for generating complex number problems
- Supports addition, subtraction, multiplication, and division operations
Part of the algebra tasks collection in reasoning-gym.
