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/core/src/inline-scripts/pickerApi.ts

@@ -0,0 +1,34 @@
+export type HyperframePickerBoundingBox = {
+  x: number;
+  y: number;
+  width: number;
+  height: number;
+};
+
+export type HyperframePickerElementInfo = {
+  id: string | null;
+  tagName: string;
+  selector: string;
+  label: string;
+  boundingBox: HyperframePickerBoundingBox;
+  textContent: string | null;
+  src: string | null;
+  dataAttributes: Record<string, string>;
+};
+
+export type HyperframePickerApi = {
+  enable: () => void;
+  disable: () => void;
+  isActive: () => boolean;
+  getHovered: () => HyperframePickerElementInfo | null;
+  getSelected: () => HyperframePickerElementInfo | null;
+  getCandidatesAtPoint: (clientX: number, clientY: number, limit?: number) => HyperframePickerElementInfo[];
+  pickAtPoint: (clientX: number, clientY: number, index?: number) => HyperframePickerElementInfo | null;
+  pickManyAtPoint: (clientX: number, clientY: number, indexes?: number[]) => HyperframePickerElementInfo[];
+};
+
+declare global {
+  interface Window {
+    __HF_PICKER_API?: HyperframePickerApi;
+  }
+}