- complete signature to be `run`
- fix test
- orangecontrib: make inheritance to `Registered` instead of `OWEwoksWidget`
Because `OWEwoksWidget` enforce to use the defined ewokstaskclass which is not something we want for now (avoid task associated with gui, processes on threads...)

For now process is always call. When call from workflow_concept it insure the input has benn provided previously. Otherwise you should provide the xas_object. It might evolve with time.

Add some simple unit test to insure an orangecontrib est workflow can be converted to a graph and a graph to an est workflow.
Add test to insure we can execute it as well

Make `Process` inherit from Task
Create a OWESRFWidget which inherit from OWWidget and implement stuff for the task graph.

OWESRFWidget fir the expected design for the esrf task graph. Creating a OWWidgetTaskExecutor for example

processing source code used:

input_ows_file = "..."
from esrf2orange3.owsconvert import ows_to_esrf, esrf_to_ows
from esrftaskgraph.graph import TaskGraph
graph = ows_to_esrf(input_ows_file)

[orangecontrib][larch] add a call to `_updateProcess` on larch widget initialization to insure `_larchSettings` is updated if there is no modification of the parameters

- add orangecontrib widget e0calculation
- pymca and larch widgets are now sensible to any 'e0' defnition from XASObject configuration.
- E0 calculator now reset the roi by default when a new xas object is given.

[orangecontrib][larch] normaize call to larch: from the main thread with some callback to QApplication.processEvents

[orangecontrib] add _ParameterWindowContainer to add a auto/manual option for computation in OW from larch and pymca

- orange signal 'spectra' is renamed xas_obj
- update to the new orange way to define Input and Output
- add a converter widget to convert from xas object to data table

[orangecontrib] update xasobject copies to duplicate the associated h5 file (storing processing flow)

[orangecontrib][larch] add a _USE_THREAD variable to skip processing on thread for larch orangewidget for debugging

[pymca/larch] start normalization between the two process. Update display and check values for normalization vs pre_edge

For now this is just comparaison, no internal process is made to make fit the two libraries.