add example all-mini-lm-l6

[kn0sys]

This example is useful for working with sentence-transformers. It pulls the model.onnx file from huggingface and the tokenizer.json file is in the data directory.

[codecov[bot]]

Codecov Report

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

Project coverage is 46.12%. Comparing base (9282c3b) to head (300d481).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #243 +/- ## ======================================= Coverage 46.12% 46.12% ======================================= Files 30 30 Lines 2077 2077 ======================================= Hits 958 958 Misses 1119 1119 ```

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