A stable and robust BC added for stationary and moving curved BCs

[hsalehipour]

1. Added a stable and robust BC for stationary and moving curved BCs which is a hybrid between differentiable interpolated bouceback and the Grads Approximation and the Regularization methods. Preliminary tests indicate stable resutls for exceedingly high Re values using the wind tunnel example.

2. Added a new boundary masker that also provides fractional distance to the mesh used in the above boundary for curved geometries.

3. Made major changes to the inputs and outputs of BC functionals by passing in entire f_0 and f_1 fields as well as the index. So all the auxiliary data are now build and constructed (if needed) inside the BC class.

4. The above change coincidently removed the perf drop experienced by going from Warp 1.3 to 1.4

5. Existing Perf Drop: I am seeing about 38%!!! perf drop (2780 vs 4448 MLUPS) due to these 3 lines in nse_stepper.py using Warp 1.4 on my A6000 GPU!

if _boundary_id == bc_struct.id_GradsApproximationBC:
                    if _missing_mask[l] == wp.uint8(1):
                        f_0[_opp_indices[l], index[0], index[1], index[2]] = self.store_dtype(f1_thread[_opp_indices[l]])

[mehdiataei]

This looks great. Thanks. There are some small cosmetic issues that will be fixed in my next PR. Nothing significant.