Add mission and vision page with updated diversity and teaching statements

[bernalde]

PR Summary

Provide a concise summary of the changes. Focus on: purpose, scope, and any user-facing impact.

• Motivation: Enhance the website by adding a dedicated mission and vision page, updating the diversity and inclusion statement, and refining the teaching statement for clarity and engagement.
• Main changes: Introduced a new mission and vision page, embedded the updated diversity statement directly into the site, and removed PDF versions of the diversity and teaching statements. Added a teaser on the homepage linking to the new mission page.
• Related issues (if any): None.

Preview Artifact

This PR triggers the Preview Build workflow.

• Download the preview-site artifact from the workflow run to inspect the generated site.

• To view locally: Extract the artifact and serve it with a local web server:

  # Extract the zip file, then run one of:
  python3 -m http.server 8000
  # or
  npx serve
  # or
  php -S localhost:8000

  Then browse to http://localhost:8000

• Note: Opening HTML files directly (file://) won't work correctly due to absolute paths.

• Internal and external link check logs are in the preview-link-check-logs artifact.

• Link checks are non-blocking; fix issues where practical before merge.

Image & Asset Guidelines

Only WebP images should be referenced in the site; originals (PNG/JPG/etc.) may be stored for provenance.

1. Always reference the .webp version in Markdown/HTML.

2. Originals can live alongside WebP conversions but must NOT be used directly in content.

3. Prefer descriptive, kebab-case filenames (e.g., joao-victor-paim.webp).

4. If adding a new image, convert to WebP first. Example conversion commands:

   # Using cwebp
   cwebp input.jpg -q 80 -o output.webp
   
   # Using ImageMagick
   magick input.png -quality 80 output.webp

5. Run the existing resize helper if appropriate:

   ./resize_images.sh

   (Ensure the script suits the new image before relying on it.)

Checks Before Requesting Review

• Jekyll preview build succeeds locally (bundle exec jekyll build).
• All referenced images are WebP (originals not directly referenced).
• All member/profile links verified.
• External links added are valid (ignore transient 429/timeout warnings unless persistent).
• No large binary files (>5MB) added without justification.

Follow-up / Deployment Notes

(Optional) Add anything maintainers should do post-merge (e.g., invalidate CDN, update external references).

Screenshots (If UI/Content Changes)

Attach before/after comparisons for visual modifications.

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Maintainers: Ensure branch protection requires only CI + Preview jobs, not production Pages deployment for PRs.

[AlbertLee125]

Minor wording suggestion: “race” and “ethnicity” are often overlapping in this context. To streamline the sentence and improve clarity, we could consider keeping just one (e.g., ethnicity) without changing the intent of the statement.

[AlbertLee125]

This part seems to overlpa from the diversity statement, 'Fostering an inclusive, equitable, and supportive research and learning environment'.

[AlbertLee125]

From the diversity statement, This phrase overlaps with "“Accessible and equitable teaching… inclusive pedagogy and accessible materials…”.

[AlbertLee125]

I noticed some thematic overlap between the Diversity statement and the Teaching Statement, particularly around inclusion, mentoring, and accessibility. Since the DEI page already addresses group culture and values, it may help to further distinguish the Teaching Statement by emphasizing teaching as preparation for applying technical skills for broader human and societal benefit.