CliMA/Oceananigans.jl: v0.76.7

Oceananigans v0.76.7 Diff since v0.76.6 Closed issues: Need actual doctstring for SpecifiedTimes (#2608) Need to document the available solver method options for ImplicitFreeSurface solvers (#2620) Need to check for constant depth before we use the FFTBasedPoissonSolver in HydrostaticFreeSurfaceModel? (#2626) Rename Poisson Solvers section in Docs? (#2637) Is calc_∇²! redundant in view of compute_∇²!? (#2638) Merged pull requests: Partial cell immersed boundaries (#2306) (@francispoulin) Implements a multigrid solver for Poisson and implicit free surface equations on CPU (#2396) (@glwagner) Fields in viscosity operators (#2580) (@simone-silvestri) Add docstring for SpecifiedTimes (#2617) (@navidcy) Update package's dependencies (#2619) (@navidcy) Update ImplicitFreeSurface & HeptadiagonalIterativeSolver docstrings (#2621) (@navidcy) Add empty PR template (#2624) (@navidcy) Docs library cleanup (#2627) (@navidcy) Some updates in validation scripts: AveragedField() -> Field(Average()) (#2630) (@navidcy) Fix typo in Docs/Buoyancy models (#2633) (@navidcy) Small bugfix for ContinuousBoundaryFunction (#2634) (@simone-silvestri) Use predefined compute_∇²! instead of defining new calc_∇²! in test_matrix_poisson_solver.jl (#2640) (@navidcy) Rename Docs/Numerical Implementation/Poisson solvers section -> Elliptic solvers (#2641) (@navidcy) VectorInvariant as a default for HydrostaticFreeSurfaceModel with LatitudeLongitudeGrid (#2644) (@simone-silvestri) Minor changes in Langmuir and Ocean wind mixing examples (#2646) (@tomchor) Small change to 1D diffusion example (#2648) (@tomchor