[xas-viewer] several fix to handle all the data format and the update of display when parameters change

Rework results save

See merge request workflow/est!35

rename parameter 'data' in 'write_xas_proc' to 'results'

[core][dim] rename energy / channel dim Z

See merge request workflow/est!34

Add ows to script

Closes #35

See merge request workflow/est!33

- XasObject.dim1, XasObject.dim1 are no more existing
- energy is now always dimensionless

- add `outputs` and `inputs` entries in processing classes used in ppfaddon aliases file.
- add `get_xas_obj` function in est.app.utils module
- mode est.app.utils._convert_spectra_dims to public

[refactoring] split types.py class

Closes #24

See merge request workflow/est!32

- rename '_volurm_for' to 'map_to'. Remove dim1 and dim2 parameter: now useless because we can dircetly get them for the spectra class

- refactor types to create submodule
- Spectra is now a class instead of a simple list from XasObject
- Spectra contains data which is a numpy ndarray of Spectrum. This was it is simpler
to reshape it andd should offer some flexibility for the futures.
- this is the main PR but several smaller one are expected to come for cleaning...