Fix: Dealing with the various version of the Febus Format

[atrabattoni]

Because the Febus format version history is undocumented, we encorage to manually set the trimming and timing strategy when reading Febus file.

Add:

• Possibility to pass engine kwargs to all xdas.open_* functions.
• overlaps and offset kwargs to read function of xdas.io.febus. Warn if kwargs not passed.
• Some documentation in the Data Formats section.

Example:

xdas.open_dataarray("path.h5", engine="febus", overlaps=(100, 100), offset=1000)

When we will be sure about this function, we will remove the warnings.

[atrabattoni]

@ClaudioStrumia Could you test that branch on real data to validate it. Also could you check the by default trimming and try to propose something that should work in most cases.

[codecov]

Codecov Report

Attention: Patch coverage is 14.70588% with 29 lines in your changes missing coverage. Please review.

Project coverage is 85.31%. Comparing base (0249f19) to head (c6b0f35).
Report is 10 commits behind head on dev.

Files with missing lines	Patch %	Lines
xdas/io/febus.py	6.89%	27 Missing ⚠️
xdas/core/routines.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev      #19      +/-   ##
==========================================
- Coverage   85.89%   85.31%   -0.59%     
==========================================
  Files          28       28              
  Lines        3312     3336      +24     
==========================================
+ Hits         2845     2846       +1     
- Misses        467      490      +23     

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