examples: add GenerationUX — 100 historical design systems

[GenerationUX]

This PR contributes 100 DESIGN.md files to the examples collection — one folder per system, each containing a DESIGN.md, a rendered HTML artifact, a PNG screenshot, and a tokens.js payload.

The collection spans roughly a century of visual systems: modernist graphic design (Swiss Style, Bauhaus, Constructivism), first-generation corporate identity programmes (NASA, IBM, Lufthansa, British Rail), interface and computing history (Xerox Star through Palm Pilot and Windows 95), wayfinding systems (NYCTA, London Underground, Schiphol), broadcast identities, technical document standards, vernacular traditions (Pakistani truck art, Jamaican dancehall flyers, Nollywood poster painting), and print processes.

Each DESIGN.md was produced by a forensic-archivist pipeline that traces colour values, typefaces, and layout decisions to primary sources where available, assigns attestation levels (attested, inferred, conventional, unverified), and records unresolved conflicts explicitly using CONTESTED markers rather than silently resolving them. The provenance front matter key makes the factual basis of each file auditable.

All 100 files pass npx @google/design.md lint with zero errors. Known warnings are documented in the README.

[davideast]

Hey @GenerationUX! This is quite the impressive collection.

I don't think we can fit this into source control as it's 402 files which many sets independently represent the same design and are liable to drift or rot over time.

However, I am working on something that involves collecting and sourcing DESIGN.md for measurement and I think this could be a great fit. It would likely involve storing these in a bucket or something else but I would love to have your help or feedback on this project once I get it into better shape.

I'm going to close this PR but not as a no, rather a let's find the right place. I very much appreciate the effort here.