* fix: use apply_chat_template to find turn boundaries and allow tool_calling field
* fix: keys to include in turn
* feat(doc): explicitly recommend setting train_on_eos and roles_to_train
* fix: eos not being masked for tool due to template padding
* chore: clear up docs
* fix: default messages format, train_on_eos: turn, and train on all assistant msg
* fix: properly warn if empty content
* feat: parametrize chat_template tests to test different tokenizers
* fix: set proper default for message key
* fix: update defaults to match load function
* fix: change defaults to use new
* feat: add tool_calling dataset
* feat: add tool_calling test
* fix: add handling of edge case of mistral tokenizer with only system prompt
* feat: refactor all test to follow source code
* fix: remove unnecessary eos_token from phi35
* fix test for phi3.5 since eos was dropped from chat_template
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Co-authored-by: Wing Lian <wing@axolotl.ai>
