Pyproximal

* Added ``pyproximal.optimization.primal.AndersonProximalGradient`` solver
* Added ``pyproximal.proximal.HuberCircular`` operator
* Added `fungrad` method to ``pyproximal.proximal.Nonlinear``
* Modified ``pyproximal.proximal.Huber`` operator as previously
erroneously implemented using the definition of Circular Huber norm

* Added ``pyproximal.optimization.palm.iPALM`` solver
* Added ``pyproximal.optimization.palm._backtracking`` method to be used when `gammaf=None` and/or `gammag=None`
* Added ``pyproximal.utils.gradtest.gradtest_proximal`` and ``pyproximal.utils.gradtest.gradtest_bilinear`` methods
* Added `tol` to ``pyproximal.optimization.primal.ProximalPoint`` and
``pyproximal.optimization.primal.ProximalGradient`` solvers
* Modified ``pyproximal.ProxOperator.precomposition`` to allow `b` being also a vector

* Added ``pyproximal.projection.L01BallProj`` and ``pyproximal.proximal.L01Ball`` operators
* Added ``eta`` to ``pyproximal.optimization.primal.ProximalGradient``
* Added ``eta`` and ``weights`` to ``pyproximal.optimization.primal.GeneralizedProximalGradient``
* Allow ``eta`` to ``pyproximal.optimization.primal.ProximalGradient`` to have iteration-dependent ``epsg``
* Switched from ``lsqr`` to ``cg`` in ``pyproximal.projection.AffineSetProj``

* Added ``pyproximal.proximal.RelaxedMumfordShah`` operator
* Added cuda version to the proximal operator of ``pyproximal.proximal.Simplex``
* Added bilinear update to ``pyproximal.optimization.primal.ProximalGradient``
* Modified ``pyproximal.optimization.pnp.PlugAndPlay`` function signature to allow using any proximal solver of choice
* Fixed print in ``pyproximal.optimization.primaldual.PrimalDual`` when using cupy arrays
* Fixed ``pyproximal.utils.bilinear.LowRankFactorizedMatrix`` when ``n=m``

:vertical_traffic_light: :vertical_traffic_light: This is the first release supporting PyLops v2.
:vertical_traffic_light: :vertical_traffic_light:

* Added ``grad`` method to ``pyproximal.utils.bilinear.LowRankFactorizedMatrix`` operator
* Allow passing optional arguments to solvers in ``pyproximal.proximal.L2``
* Modified codebase to integrate with pylops's ``cupy`` backend.
* Modified codebase to integrate with ``pylops`` v2.

:vertical_traffic_light: :vertical_traffic_light: This is the latest release supporting PyLops v1.
:vertical_traffic_light: :vertical_traffic_light:

* Added ``pyproximal.proximal.Log1`` operator
* Allow ``radius`` parameter of ``pyproximal.proximal.L0`` to be a function
* Allow ``tau`` parameter of ``pyproximal.optimization.primal.HQS`` to be a vector
and change over iterations
* Added ``z0`` to ``pyproximal.optimization.primal.HQS``
* Added ``factorize`` option to ``densesolver`` of ``pyproximal.proximal.L2``