fix: publish Node-compatible package entrypoints

[miguel-heygen]

What

Fixes #1621 by making the published HyperFrames packages importable from plain Node package consumers instead of exposing monorepo-only source entrypoints.

Why

The issue is real. @hyperframes/engine@0.6.119 publishes a manifest whose main, types, and exports point at src/*.ts. A clean Node import therefore fails before user code runs because Node does not execute TypeScript package entrypoints.

Fixing that manifest exposed the next layer of the same packaging root cause: @hyperframes/core already publishes dist, but its emitted ESM used extensionless relative imports such as ./slideshow/parseSlideshow and dotted basenames such as ./core.types. Those are not Node-resolvable in ESM either.

How

• Add publishConfig and files for @hyperframes/engine so packed npm metadata points at compiled dist entrypoints.
• Add a post-tsc core build step that rewrites compiled relative ESM imports to Node-resolvable .js paths, including dotted basenames like core.types.
• Build packageable Studio library entrypoints for @hyperframes/studio and @hyperframes/studio/tailwind-preset, while sharing the Tailwind preset with the app config to avoid drift.
• Harden verify:packed-manifests so it now packs every public workspace and rejects:
  • leftover workspace: refs in packed manifests
  • packed manifest entrypoints that expose src/*.ts
  • packed manifest entrypoints that point at missing files
  • packed JavaScript with Node-incompatible relative ESM imports

Test plan

• PATH=/home/ubuntu/.nvm/versions/node/v22.22.2/bin:$PATH bun run build
• PATH=/home/ubuntu/.nvm/versions/node/v22.22.2/bin:$PATH bun run verify:packed-manifests
• Clean temp-project smoke: pnpm pack local core, player, sdk, engine, and studio tarballs, install them into an empty npm project, and import:
  • @hyperframes/core
  • @hyperframes/core/slideshow
  • @hyperframes/engine
  • @hyperframes/engine/alpha-blit
  • @hyperframes/engine/shader-transitions
  • @hyperframes/studio/tailwind-preset
  • @hyperframes/studio
• Pre-commit hook: lint, format, fallow, typecheck

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