add demo notebook for SOMSpecSelector #171

[sschmidt23]

Add the demo notebook for the SOMSpecSelector degrader/selector

Code Quality

• My code follows the code style of this project
• I have written unit tests or justified all instances of #pragma: no cover; in the case of a bugfix, a new test that breaks as a result of the bug has been added
• My code contains relevant comments and necessary documentation for future maintainers; the change is reflected in applicable demos/tutorials (with output cleared!) and added/updated docstrings use the NumPy docstring format
• Any breaking changes, described above, are accompanied by backwards compatibility and deprecation warnings

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (e539da2) to head (62db984).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #172   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            1         1           
  Lines            1         1           
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  Hits             1         1           

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[hangqianjun]

Looks good!