pySEA integration

[erh3cq]

wf_tem.to_sea(...) gives

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Cell In[13], [line 1](vscode-notebook-cell:?execution_count=13&line=1)
----> [1](vscode-notebook-cell:?execution_count=13&line=1) wf_tem.to_sea(file_path=r"C:\Users\e81\Downloads\pyslice_test.sea")

File ~\Documents\GitHub\PySlice\src\pyslice\data\pyslice_serial.py:128, in PySliceSerial.to_sea(self, file_path, force_datasets)
    125     force_datasets = ['data']
    126 force_datasets = list(force_datasets) + config_force_datasets
--> [128](https://file+.vscode-resource.vscode-cdn.net/c%3A/Users/e81/Documents/GitHub/PySlice/~/Documents/GitHub/PySlice/src/pyslice/data/pyslice_serial.py:128) super().to_sea(file_path, force_datasets=force_datasets)

File ~\Documents\GitHub\PySlice\src\pyslice\data\pyslice_serial.py:19, in Signal.to_sea(self, *args, **kwargs)
     18 def to_sea(self,*args,**kwargs):
---> [19](https://file+.vscode-resource.vscode-cdn.net/c%3A/Users/e81/Documents/GitHub/PySlice/~/Documents/GitHub/PySlice/src/pyslice/data/pyslice_serial.py:19)     raise ImportError("pySEA is required for .to_sea() serialization")

ImportError: pySEA is required for .to_sea() serialization

pydslice_serial.py appears to have a silent try/except for sea_eco import, which is missed