Move docs/ package mirror into document-navigator plugin

Relocate the ~6k-file docs tree from the repo root into
plugins/document-navigator/docs/ so the plugin is self-contained and
portable. docs/superpowers/ (specs and plans) stays at the repo root.

Moved via cp+rm rather than git mv because directory rename() fails with
EPERM on this WSL /mnt DrvFs mount; git rename-detection pairs the
identical-content files at commit time.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

plugins/document-navigator/docs/media/audio/audio-analysis-pitch/README.md

@@ -0,0 +1,63 @@
+# @suaveplan/audio-analysis-pitch - Universal pitch, key, and chord detection AnalysisOp plugins for the @suaveplan/audio-* family. YIN/McLeod/cepstrum f0 estimation, Krumhansl-Schmuckler / Temperley key finding, chromagram template-matched chord progressions with temporal smoothing.
+
+Universal pitch, key, and chord detection Analysis Op plugins for the `@suaveplan/audio-*` family. Three detectors:
+
+- `PitchDetector` — fundamental frequency via YIN (default), McLeod, or cepstrum.
+- `KeyDetector` — Krumhansl-Schmuckler / Temperley key finding over an aggregated chromagram.
+- `ChordDetector` — per-frame chromagram template matching with temporal smoothing.
+
+Runs identically in browser and server. No DOM or Node-only APIs. The package vendors its own real FFT so it has no hard dependency on `@suaveplan/audio-analysis-spectrum`.
+
+<!-- begin:auto-docs -->
+## Documentation tree
+
+- [chord-matching](./src/algorithms/chord-matching.md) — `chord-matching.ts` identifies the closest chord template (major / minor / diminished / augmented over twelve roots — 4…
+- [chromagram](./src/algorithms/chromagram.md) — `chromagram.ts` folds a spectral frame into the twelve pitch classes used by Western tonal analysis. Each magnitude bin…
+- [downmix](./src/algorithms/downmix.md) — `downmix.ts` provides the per-block mono-folding utilities shared by all three detectors in `@suaveplan/audio-analysis-…
+- [key-finding](./src/algorithms/key-finding.md) — `key-finding.ts` correlates an aggregated chromagram against 24 major/minor key profiles to estimate the musical key of…
+- [yin](./src/algorithms/yin.md) — `yin.ts` ships three fundamental-frequency estimators behind a unified `PitchEstimate` shape so the `PitchDetector` can…
+- [chord-detector](./src/detector/chord-detector.md) — `chord-detector.ts` ships the `ChordDetector` Analysis Op which produces a time-ordered chord progression for an `Audio…
+- [key-detector](./src/detector/key-detector.md) — `key-detector.ts` ships the `KeyDetector` Analysis Op (plugin slot 3) which estimates the musical key of an `AudioDocum…
+- [pitch-detector](./src/detector/pitch-detector.md) — `pitch-detector.ts` exposes the `PitchDetector` class — the Analysis Op plugin (plugin slot 3 in the `@suaveplan/audio-…
+- [error-codes](./src/error-codes/error-codes.md) — `error-codes.ts` defines the stable `AUDIO_ANALYSIS_PITCH.*` error code registry, the metadata table describing each co…
+  - [error-codes](./src/error-codes/error-codes.md) — `error-codes.ts` defines the stable `AUDIO_ANALYSIS_PITCH.*` error code registry, the metadata table describing each co…
+<!-- end:auto-docs -->
+
+## Install
+
+```bash
+bun add @suaveplan/audio-analysis-pitch
+```
+
+## Quick start
+
+```ts
+import {
+    ChordDetector,
+    KeyDetector,
+    PitchDetector,
+} from "@suaveplan/audio-analysis-pitch";
+
+const pitch = await new PitchDetector().analyze(doc);
+const key = await new KeyDetector().analyze(doc);
+const chords = await new ChordDetector().analyze(doc);
+```
+
+## Subpath exports
+
+Every feature module is independently importable for fine-grained tree-shaking:
+
+```ts
+import { yinPitch } from "@suaveplan/audio-analysis-pitch/algorithms/yin";
+import { detectKey } from "@suaveplan/audio-analysis-pitch/algorithms/key-finding";
+import { PitchDetector } from "@suaveplan/audio-analysis-pitch/detector/pitch-detector";
+```
+
+## Error codes
+
+All errors are `AudioAnalysisError`s carrying one of the `AUDIO_ANALYSIS_PITCH.*` codes: `INVALID_OPTIONS`, `ABORTED`, `UNSUPPORTED_FORMAT`, `INSUFFICIENT_DATA`.
+
+## License
+
+MIT
+