docs: add OpenCite links to repository guide

[beanbean9339]

Summary

• Added OpenCite guidance and links to the Citation section.
• Added OpenCite guidance and links to the Zenodo Metadata section.
• Linked researchers to OpenCite for generating standardized citation and Zenodo metadata files.

Issue

Closes #83

Testing

• Reviewed the Markdown changes.
• Verified that both OpenCite links point to https://imageomics.github.io/OpenCite/.
• Confirmed that the changes are limited to the GitHub Repo Guide documentation.

[Copilot]

🟢 Approval recommended

The documentation changes satisfy the linked issue and any remaining feedback is minor wording/clarity polish.

Pull request overview

This PR updates the GitHub Repo Guide documentation to point readers to OpenCite as a guided way to generate standardized citation and Zenodo metadata files, addressing issue #83.

Changes:

• Added an OpenCite explainer and call-to-action link/button under the CITATION section.
• Added OpenCite guidance and a call-to-action link/button under the Zenodo Metadata section.

File summaries

File	Description
docs/wiki-guide/GitHub-Repo-Guide.md	Adds OpenCite links/guidance to help generate CITATION.cff and .zenodo.json metadata files in the repo guide.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 2
• Review effort level: Lite

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[egrace479]

I think the flow is interrupted a bit with the introduction of OpenCite, so suggesting instead having a shared longer description in a footnote and packaging it in with the template descriptions + Pro Tip boxes with shorter descriptions. This also reduces redundancy for the more detailed description.