Consistently use Xarray for Grid Reader, Improved Dask Support (#1092)

* preserve dask when loading MPAS grids

* use pure xarray for reading mpas grids

* remove values from face_node_connectivity property

* continue dask implementation, fix repr speed and lost attributes

* update decorator

* use face centers instead of nodes due to slow connectivity construction

* update slice.py

* small update

* work on io

* some progress

* fix failing fesom test

* work on refactor

* clean up docstrings and chunking

* update edge properties

* update coordinates

* remove .data

* update dask notebook

* pre-commit

* work on api

* work on api

* fix issue with mutable dictionary

* update notebook

* update coord call

* update healpix

* update notebook

* clean up comments and leftover code

* use xarray directly for esmf

* update subset notebook

* update docstrings

* add concat to api

* update comments

* add test for failing from topology test

* update parameter for healpix boundary construction

---------

Co-authored-by: Aaron Zedwick <[email protected]>

Author: philipc2

docs/api.rst

@@ -19,6 +19,7 @@ Top Level Functions
    open_grid
    open_dataset
    open_mfdataset
+   concat
 
 
 Grid