support array layouts in *_loop and jax_* backends of ETermBase
support array layouts in *_loop and jax_* backends of ETermBase

- term output arrays have cells as axis 0 for all layouts
- new ExpressionBuilder.get_slice_ops(), update .transform()
- update ETermBase.make_function()

sfepy/sfepy,sfepy/sfepy,BubuLK/sfepy,BubuLK/sfepy,vlukes/sfepy,vlukes/sfepy,rc/sfepy,rc/sfepy,vlukes/sfepy,sfepy/sfepy,BubuLK/sfepy,rc/sfepy