Rename type shpc to `shpc_slice_handler`

Common/derived_types.f90

Common/read_eddy.f90

Common/read_field_indices.f90

Common/read_snapshot.f90

Common/shpc_close.f90

Common/shpc_create.f90

Common/shpc_open.f90

Common/write_eddy.f90

Inst_eddies/Tests/test_get_1_outerm.f90

Inst_eddies/Tests/test_nearby_extr.f90

Inst_eddies/Tests/test_set_all_outerm.f90

Inst_eddies/Tests/test_set_max_speed.f90

Inst_eddies/Tests/test_write_eddy.f90

Inst_eddies/inst_eddies.f90

Overlap/Tests/test_get_dispatch_snap.f90

Overlap/Tests/test_overlap.f90

Overlap/Tests/test_read_eddy.f90

Overlap/Tests/test_read_snapshot.f90

Overlap/Tests/test_send_recv.f90

Overlap/Tests/write_snapshot.f90