v0.6.46 — Spatial query (`sceneGeometry`/`hitTest`) + embedded-editor `player --edit`

Added

Spatial query (sceneGeometry/hitTest) + embedded-editor player --edit

• New core spatial query — the spatial analog of sceneManifest: where manifest answers
  "what can I edit?" (addresses), sceneGeometry(compiled, t) answers "where is it on screen,
  and what's under a point?". Returns each node's rotated corners + AABB bounds, group
  bounds (union of descendants), and motionPath waypoints (→ timeline.<label>.points).
  hitTest(geometry, x, y) → the topmost node at a point. Pure functions over the DisplayList
  (each op already carries its source id + final scene-space transform) + canvas-free Inter
  advances (textWidth) — no evaluate/DisplayOp change, goldens byte-identical. Exported
  from @reframe/core; CLI reframe geometry <scene> [--t <sec>] [--json].
• player --edit — an embedded-editor build of the HTML player: no autoplay, seek-driven,
  exposing window.__reframe = { seek, hitTest, bounds, waypoints, setOverlay, play, pause } +
  a host↔iframe postMessage channel. setOverlay(doc) re-runs composeScene+compileScene
  +redraw in-browser, no reload — the live overlay-preview loop, so a dragged node/waypoint
  round-trips as a regen-stable overlay patch. --edit-origin gates event.origin. The default
  (no --edit) build is byte-identical. Closes #81.