KAK decomposer for 2 qubit UnitaryMatrix gate

[lqtmirage]

• Added a transpiler to decompose two qubit UntiaryMatrix gates into gate sequences containing H, S, RX, RY, RZ, and CNOT gates (called KAK decomposition)
• Test cases check the parameters after the transformation with UnitaryMatrix gates corresponding to SWAP, CZ, and one deterministic numerical gate
• In porting, the matrix representation of circuits before and after the conversion is verified numerically in some random cases

References

• Main functions are ported from the source code written by Morisaki-san
• The original paper is here and is listed as a reference in the docstring
  • https://arxiv.org/abs/2112.14524 (pp.4-5)

[github-actions]

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