Add Colang v2 example for sensitive data detection

[lapinek]

Description

This PR adds a new example configuration for sensitive_data_detection using Colang v2 flows:
examples/configs/sensitive_data_detection_v2/

It also adds the necessary global declarations to allow the rails to output redacted data (however, see the related issue below).

Related Issue(s)

• Depends on: fix: Apply guardrails transformations to LLM inputs and bot outputs. #1297

Mentions

@drazvan — it looks like you’ve contributed to this package along with [email protected]. If you could take a look, that would be great!

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.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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⚠️ Report is 7 commits behind head on develop.

Additional details and impacted files

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  Misses             ?     4804           
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