Add citation for project citation details

[Tavish9]

What does this PR do?

This PR adds article citation for the repo.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Was this discussed/approved via a GitHub issue? Please add a link to it if that's the case.
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

[Copilot]

Pull Request Overview

This PR adds a CITATION.cff file to provide standardized citation information for the EO-1 research project. The Citation File Format (CFF) enables automated citation generation for academic and research software projects.

• Adds a new CITATION.cff file with complete author information and publication details
• Includes both general project citation and preferred article citation formats
• References the arXiv preprint for "EO-1: Interleaved Vision-Text-Action Pretraining for General Robot Control"

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