Add NeurIPS paper to the reference list

[TomeHirata]

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[Copilot]

Pull Request Overview

This PR updates the documentation to add a new NeurIPS paper reference about imperfect compliance and updates an existing paper from preprint status to published ICML proceedings.

• Adds a new research paper on distributional causal inference under imperfect compliance
• Updates the primary paper from arXiv preprint to ICML'24 conference proceedings
• Updates citation format from article to conference-paper in CITATION.cff

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
docs/source/index.rst	Adds new paper reference and updates existing paper to ICML proceedings format
docs/source/api_reference.rst	Updates theoretical foundations text and adds the new compliance paper reference
docs/source/api/local.rst	Adds documentation context for imperfect compliance scenarios with new paper reference
README.md	Updates paper citations to conference format and adds new imperfect compliance section
CITATION.cff	Updates preferred citation from article to conference-paper and adds new compliance paper to references

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