feat: add image agent team presentation

[mitchelltop]

Summary

Adds a self-contained 21-slide HTML presentation for the Image Agent project

Motivation

Give the team a clean modern and portable presentation that explains the research architecture evidence real output and Imagent roadmap without requiring presentation software

Changes

• Add the responsive single-page presentation with keyboard touch wheel notes and fullscreen controls
• Add locally bundled generated visuals benchmark examples pipeline diagram showcase outputs and JetBrains Mono font
• Add chapter-specific color systems strong motion hover effects and projector-safe responsive layouts
• Keep every slide within one viewport with no internal scrolling

Testing

• Manual browser QA across all 21 slides
• Verified at 1920x1080 1366x768 1280x650 and 900x650
• Verified all 13 local assets load successfully
• npm run lint
• npm run build
• CI passes

Visual Evidence

Open imagent-ui/public/presentation.html and navigate through the full deck

Notes

Maintainer presentation change outside the active contributor competition

One atomic commit with no application source changes