Simuq

Major changes:
- Added support of D-Wave devices through D-Wave Leap, with D-Wave backends.
- Added Ising AAIS and its support for D-Wave devices.
- Optimized Hamiltonian representation by introducing `productHamiltonian`.
- Added 2-Pauli AAIS and its support for IonQ devices in `IonQProvider` and `BraketProvider`.
- (Experimental) Added a three-to-two local interaction transformation.

Minor changes:
- Added methods for printing Hamiltonians and quantum systems.
- Added more gates in `IonQCircuit` for easy implementation of state preparation and measurement.
- Added a `Config` class, a shortcut for setting global configurations.
- Updated notebooks.
- Cleaned up unused code.
- Fixed many small bugs.
- Updated README.

Changes:
* Fixed Qiskit API discrepancy.
* Optimized performance of sequences of additions.
* Added a summation operation for a list of `TIHamiltonian`.
* Added QuTiP solver's option to deal with large Hamiltonians.

Changes:
- Added second-order and randomized first-order Trotterization.
- Added artifact evaluation notebooks to reproduce data in our paper.
- Improved support for IBM backends.
- Fixed bugs.

Major bug fixing.

Initial release of SimuQ.