Multivariate Multicycle Codes

We introduce a novel quantum error correcting code, namely Multivariate Multicycle QECC whose subfamilies include: - Bivariate Bicycle Codes, [High-threshold and low-overhead fault-tolerant quantum memory](https://arxiv.org/pdf/2308.07915) - Trivariate Tricycle Codes, [Single-Shot Decoding and Fault-tolerant Gates with Trivariate Tricycle Codes](https://arxiv.org/pdf/2508.08191) - Tetravariate Tetracycle Codes (first discovered in QuantumClifford.jl, #590)