COSMOS example notebook

[raphaelshirley]

Closes #13

Basic example notebook running cosmos on a small number of objects that can be increased by the user

Problem & Solution Description (including issue #)

We will want to wait till latest Param changes are merged and rewrite before merging.

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

Attention: Patch coverage is 7.14286% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 46.57%. Comparing base (14a5c3b) to head (dca196e).

Files	Patch %	Lines
src/rail/estimation/algos/lephare.py	7.14%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #42      +/-   ##
==========================================
- Coverage   49.63%   46.57%   -3.06%     
==========================================
  Files           2        2              
  Lines         137      146       +9     
==========================================
  Hits           68       68              
- Misses         69       78       +9     

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[drewoldag]

Looks good.