Add data structure for I/O decompositions

Author: SeanBryan51

CMakeLists.txt

@@ -268,6 +268,7 @@ else()
         src/util/cable_common.F90
         src/shared/casa_offline_inout.F90
         src/shared/casa_ncdf.F90
+        src/offline/cable_io_decomp.F90
         src/offline/cable_iovars.F90
         src/offline/cable_surface_types.F90
         src/offline/cable_define_types.F90