Added 'talk to pathml' example notebook and images

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.25%. Comparing base (70d2524) to head (353d23b). Report is 2 commits behind head on dev.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #430 +/- ## ======================================= Coverage 95.25% 95.25% ======================================= Files 38 38 Lines 3795 3795 ======================================= Hits 3615 3615 Misses 180 180 ```

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