chore(skills): remove 1,685 lines of redundant skill content (#283)

* chore(skills): remove 1,685 lines of redundant and irrelevant skill content

- Remove 5 GSAP references irrelevant to HyperFrames (scrolltrigger,
  plugins, react, frameworks, utils) — no scroll, no frameworks, no
  interactive plugins in video compositions
- Remove shader-setup.md and shader-transitions.md — duplicated by
  @hyperframes/shader-transitions package (packages/shader-transitions/)
- Remove marker-highlight.md and examples.md — JS library docs superseded
  by css-patterns.md (deterministic, GSAP-driven, fully seekable)
- Trim CLAUDE.md to dev-only instructions — move product docs (transcription,
  TTS, player) to skills where they belong
- Deduplicate house-style.md typography/motion sections — point to
  dedicated references instead of repeating rules
- Clean up stale references to deleted files across SKILL.md and catalog.md
- Update gsap skill description to reflect HyperFrames-only scope

Skills: 5,230 → 3,714 lines (29% reduction)
CLAUDE.md: 204 → 50 lines (75% reduction)

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

* fix(skills): update broken marker-highlight.md references in captions.md

Point to css-patterns.md instead of deleted marker-highlight.md.

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

* fix(skills): update stale shader CSS rule to reference package API

BG_COLOR was from the old manual setup. Now it's bgColor in the
@hyperframes/shader-transitions init() config.

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

* fix(skills): address 6 doc gaps surfaced by eval agents

P0: Document HyperShader as IIFE global name in shader-transitions README
P1: Replace async fetch() with sync XHR in effects.md audio data loading
    (fetch violates synchronous timeline construction rule in SKILL.md)
P1: Change <div> to <span> in css-patterns.md marker highlight patterns
    (<div> inside <p> is invalid HTML, breaks layout in inline contexts)
P2: Clarify bgColor as fallback color in shader-transitions README
P2: Add data-start to Composition Clips table in SKILL.md
    (root composition element needs data-start="0", linter enforces it)

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

* fix(templates): update init templates to match trimmed skill scope

- Remove ScrollTrigger/plugins/React/Vue/Svelte from gsap skill description
- Replace class="clip" with accurate pattern examples in skill intro text
  (class="clip" is still in Key Rules where it belongs)

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

* fix(skills): remove contradictory 5:1 contrast threshold from house-style

house-style.md said 5:1 minimum, but hyperframes validate enforces
WCAG AA (4.5:1 normal text, 3:1 large text). Now defers to validate
instead of stating a conflicting number.

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

---------

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

skills/gsap/references/effects.md

@@ -210,25 +210,18 @@ Requires ffmpeg and numpy.
 
 ```js
 // Option A: inline (small files, under ~500KB)
-const AUDIO_DATA = {
+var AUDIO_DATA = {
   /* paste audio-data.json contents */
 };
-setupTimeline(AUDIO_DATA);
 
-// Option B: fetch (large files)
-fetch("audio-data.json")
-  .then((r) => r.json())
-  .then((data) => setupTimeline(data));
-
-function setupTimeline(AUDIO_DATA) {
-  // IMPORTANT: all tl.call() setup must be inside this callback
-  for (let f = 0; f < AUDIO_DATA.totalFrames; f++) {
-    tl.call(() => draw(AUDIO_DATA.frames[f]), [], f / AUDIO_DATA.fps);
-  }
-}
+// Option B: sync XHR (large files — must be synchronous for deterministic timeline construction)
+var xhr = new XMLHttpRequest();
+xhr.open("GET", "audio-data.json", false);
+xhr.send();
+var AUDIO_DATA = JSON.parse(xhr.responseText);
 ```
 
-With fetch, wrap all timeline setup inside the callback so `AUDIO_DATA` is available.
+**Do NOT use async `fetch()` to load audio data.** HyperFrames requires synchronous timeline construction — the capture engine reads `window.__timelines` synchronously after page load. Building timelines inside `.then()` callbacks means the timeline isn't ready when capture starts.
 
 ### Rendering Approaches