initial code (#2)

* feat: initial code port from hyperframes-internal

Port all OSS-ready packages from the internal monorepo:
- @hyperframes/core — shared types, HTML generation, GSAP utilities, runtime
- @hyperframes/cli — CLI for creating, previewing, and rendering compositions
- @hyperframes/engine — framework-agnostic rendering engine (BeginFrame + FFmpeg)
- @hyperframes/producer — video rendering pipeline (Puppeteer + FFmpeg)
- @hyperframes/ui-player — browser-based video player component
- @hyperframes/studio — composition editor (React frontend + Hono backend)

Includes regression test suite with Docker-based test harness.

All HeyGen-internal references, deployment infrastructure, and
proprietary assets have been removed. Package names migrated
from @app/* to @hyperframes/*.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: scrub internal codenames and stale references from OSS port

- Replace static.heygen.ai runtime URLs in test fixtures
- Remove internal CDN publish script (publish-hyperframe-runtime.ts)
- Replace sandbox-studio, sandbox-interceptor, __magicEditRuntime
  with neutral names (studio, hyperframe-runtime, __hyperframeRuntime)
- Fix stale Vault API / localhost references in docs
- Remove broken deprecated_studio link

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix: remove remaining internal codenames and stale references

- Delete stale producer README.md and PIPELINE.md (referenced nonexistent files)
- Replace "Cerberus" codename with "HyperFrames" in test design reviews
- Replace magic-edit postMessage identifiers with hf-preview/hf-parent
- Rename debug-magic-edit-timeline.ts to debug-timeline.ts
- Replace "Motion Cut" with "HyperFrames" in Timeline comments
- Fix studio/CLI references to nonexistent archive package
  (use local data/projects/ dir, stub render proxy)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/cli/src/docs/gsap.md

@@ -0,0 +1,23 @@
+# GSAP Animation
+
+HyperFrames uses GSAP for animation. Timelines are paused and controlled by the runtime.
+
+## Setup
+```html
+<script src="https://cdn.jsdelivr.net/npm/gsap@3/dist/gsap.min.js"></script>
+<script>
+  const tl = gsap.timeline({ paused: true });
+  tl.to("#title", { opacity: 1, duration: 0.5 }, 0);
+  window.__timelines = window.__timelines || {};
+  window.__timelines["root"] = tl;
+</script>
+```
+
+## Key Rules
+- Always create timelines with `{ paused: true }`
+- Register timelines on `window.__timelines` with the composition ID as key
+- Position parameter (3rd arg) sets absolute time: `tl.to(el, vars, 1.5)`
+- Supported methods: `set`, `to`, `from`, `fromTo`
+
+## Supported Properties
+opacity, x, y, scale, scaleX, scaleY, rotation, width, height, visibility