feat(examples): add Liquid Geo

Summary

Adds Liquid Geo as a standalone interactive gallery example. The example renders a deterministically seeded 98,304-particle metallic shell with compute-driven ridges, spring recovery, pointer and touch deformation, responsive sizing, reduced-motion support, and lifecycle-safe GPU cleanup.

An accessible Liquid/Earth control fluidly morphs the existing simulation into an Atlantic-facing globe. Deterministic continent silhouettes condense into larger graphite beads while the ocean remains a fine metallic-blue shell; the particles, lighting, subtle motion, and pointer response stay active throughout the transition. The map and all visuals are generated from original code with no external assets.

The gallery registration, generated source/API metadata, deterministic card and hero thumbnails, and measured production chunk baseline are included.

PR type

development

Release impact

none — adds an interactive documentation gallery example without changing published package behavior.

Validation

• pnpm typecheck
• pnpm exec vitest run apps/docs/examples/liquid-geo (8 tests passed)
• pnpm --filter docs check:example-imports
• pnpm --filter docs build
• pnpm --filter docs thumbs:check -- --only liquid-geo in the Linux WebGPU software renderer
• pnpm --filter docs check:example-bundles (62,832 B gzip)
• pnpm build
• pnpm bundle-check
• pnpm migrations:check
• Manual browser verification of Liquid → Earth → Liquid morphing and settled Earth rendering

The package scopes of pnpm test:fast passed 855 tests with 76 skipped. The script scope did not complete locally because scripts/verify-examples-api-deployment.test.ts timed out in its deployment verification cases.