[ENH] Improves create_multi_comparison_matrix parameters and saving (#2657)

* Empty-Commit

* condensed parameters and showing output

* test cases updated

* changes

* updated examples

* point 2 working

* [DOC] Clarify comments regarding issue assignment limits and user notifications

* condensed parameters and showing output

* test cases updated

* changes

* dir -> save_path

* Reverted _mcm.py and its test to match main

* requested changes done, pdf not showing yet

* changes

* changes

* updated docstring

* changes

* requested changes

* example file changes

* changed formats default to None

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Co-authored-by: Matthew Middlehurst <pfm15hbu@gmail.com>

Author: aryanpola