Add a `/content` directory to centralize all materials for translation and collaboration

[tavallaie]

I would like to propose creating a dedicated /content directory in this repository to hold all public materials such as survey questions, documentation, reports, and guidelines.
Suggested structure:

/content
  /surveys
    /community-survey-2024
      /en
        questions.md
      /es
        questions.md
      /fr
        questions.md
    /outreach-survey-2023
      /en
        questions.md
      /pt
        questions.md
  /docs
    /code-of-conduct
      /en
        index.md
      /de
        index.md
  /reports
    /2023-summary
      /en
        report.md
      /ja
        report.md

This approach:

• Keeps each document or survey in its own named directory
• Uses language codes (e.g., en, es) as subdirectories under each item
• Supports both final and draft content, so people can contribute early and share feedback
• Makes translation workflows straightforward via pull requests

Having all materials in one standardized location would greatly lower the barrier for global contributors and help keep everything up to date.

I would be happy to help set up the initial /content structure or migrate existing files if this idea is supported.