Add refrigerator access and nursing space guidelines (numfocus#42)

[sanchalitorpe-source]

Description of Changes

This pull request adds accessibility guidelines to support nursing mothers at conferences and day-long events.

It introduces practical recommendations for:

• Providing clean and secure refrigerator access for breast milk storage
• Offering private, hygienic nursing and pumping spaces (not restrooms)
• Including nursing accommodation options in registration forms
• Clearly communicating available facilities through emails, signage, and event guides
• Training on-site staff to assist respectfully and discreetly

The goal is to remove participation barriers and enable nursing parents to fully engage in conference activities.

Related Issue

Closes #42

Type of Change

• ✍️ New Content — Adds new chapters, examples, or significant sections

Additional Notes (Optional)

The content is based on community discussion and inclusive accessibility best practices.
No unrelated or personal files are included.

Checklist

• I have searched open pull requests to avoid duplicates.
• I have built the book locally using the build instructions and verified my changes work as expected.
• I have written clear, conventional commit messages, as per the Pull Request Guidelines.

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[sanchalitorpe-source]

Hi! 👋
This PR (#461) adds guidelines for refrigerator access and dedicated nursing/pumping spaces for nursing mothers at conferences.
It includes:

• Providing clean and secure refrigerator access for milk storage
• Offering private, hygienic nursing and pumping spaces
• Communicating available facilities via signage and emails
• Training staff to assist respectfully and discreetly

These recommendations aim to make conferences more inclusive for attendees with nursing needs.
Looking forward to your review and feedback. Thank you! 🙏