docs: Add mention of Nemotron

[mikemckiernan]

Description

Update the reasoning traces section of the docs to add Nemotron models.

The model seems to just work, so I'm unsure if we need to say more.

Review HTML: https://nvidia.github.io/NeMo-Guardrails/review/pr-1200/user-guides/configuration-guide.html#using-llms-with-reasoning-traces

Related Issue(s)

Checklist

• I've read the CONTRIBUTING guidelines.
• I've updated the documentation if applicable.
• I've added tests if applicable.
• @mentions of the person or team responsible for reviewing proposed changes.

[github-actions]

Documentation preview

https://nvidia.github.io/NeMo-Guardrails/review/pr-1200

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.65%. Comparing base (07422c1) to head (a11c51c).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1200   +/-   ##
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  Coverage    68.65%   68.65%           
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  Files          161      161           
  Lines        15978    15978           
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  Hits         10969    10969           
  Misses        5009     5009           

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[Pouyanpi]

@mikemckiernan

related PRs:

#1145
#1176

What is important?

• apply_to_reasoning_traces defines wether we want to apply output rails on reasoning traces too or not
• we always return reasoning traces to the user (even when remove_reasoning_traces is True
• remove_reasoning_traces removes the traces from internal tasks
• remove_thinking_traces is deprecated and we should use remove_reasoning_traces (backward compatible, users can still use remove_thinking_traces)

A key change is that reasoning traces are always returned to the use

        rails:
          output:
            apply_to_reasoning_traces: True

[trebedea]

Looks good, I only have the question about why we have an example with curl on the chat endpoint.