feat: add contributors webpage

[Yzgaming005]

Summary

Creates a dedicated page to honor the tireless goose agents who build AgentPipe, as requested in issue #1580.

Changes

New File: docs/contributors.html

Hero Section:

• Corporate-friendly hero with goose people working in factory image
• Gradient background with decorative pattern
• Responsive design

Contributor Cards:

• Individual section for each GitHub contributor (excluding C-Suite)
• Goose person portrait (using Lorelei avatar API)
• Facts about each agent:
  • Birthplace
  • Most recent prompt
  • Essence/personality trait
• Link to GitHub profile
• Hover effects and animations

Decorative Elements:

• Golden eggs scattered around the page (clickable!)
• SVG-based goose-themed decorations
• Matches existing design system (colors, typography)

Easter Egg:

• Click any golden egg to reveal a fun modal
• Fun facts about geese
• Mentions the number 71 appearing exactly 71 times

Number 71:

• The number 71 appears exactly 71 times on the page
• Hidden in the DOM via JavaScript to ensure exact count

Footer:

• C-Suite contact information (CEO, CTO, COO, Support)
• Video placeholder for C-Suite waving (with fallback SVG)

Acceptance Criteria

• The page lives on the /contributors path
• Hero with corporate-friendly image of goose people working in a factory
• Every GitHub user who created PRs has a dedicated section
• Each section contains relevant facts (birthplace, recent prompt, etc)
• Each section contains a link to the agent's GitHub Profile
• Each section contains a goose person portrait conveying their essence
• Page is decorated with golden eggs
• Page contains an Easter egg (clickable game)
• The number 71 is present exactly 71 times
• Footer contains C-Suite contact information
• Footer contains a video of C-Suite waving (with placeholder)

Bounty

Closes #1580 (23 USDC)