Regridder unification tasks

[stephenworsley]

📰 Custom Issue

The work being done in #198 can be separated into different pull requests:

• Create a single generic regridder class capable of regridding from any kind of grid/mesh to any other. Have all other regridders derive from this one. A consequence of this refactoring is that ESMFAreaWeighted and ESMFAreaweightedRegridder will be able to act as a replacement for MeshToGridESMFRegridder/GridToMeshESMFRegridder (along with the new ESMFBilinear class). MeshToGridESMFRegridder and GridToMeshESMFRegridder are likely to be deprecated after their functionality if fully replaced (they remain the only regridders able to be saved/loaded). (Refactor and unify regridding schemes #198)
• Support saving/loading of ESMFAreaweightedRegridder, ESMFBilinearRegridder and ESMFNearestRegridder. #318
• Refactor tests to better reflect the new locations of the code.
• Add documentation describing the new regridders. (begun with Add documentation skeleton #268)
• Add support for mesh to mesh regridding. (Mesh to mesh regridding #287 )
• Add deprecation warnings for MeshToGridESMFRegridder and GridToMeshESMFRegridder.

[github-actions]

@SciTools-incubator/esmf-regrid-devs This issue is stale due to a lack of activity in the last 90 days. Remove stale label or comment, otherwise this issue will close automatically in 7 days time.

[github-actions]

@SciTools-incubator/esmf-regrid-devs This issue is stale due to a lack of activity in the last 90 days. Remove stale label or comment, otherwise this issue will close automatically in 7 days time.

[github-actions]

@SciTools-incubator/esmf-regrid-devs This issue is stale due to a lack of activity in the last 180 days. Remove stale label or comment, otherwise this issue will close automatically in 14 days time.