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-ir/README.md

@@ -0,0 +1,16 @@
+# `audio-ir`
+
+Impulse-response capture, loading, and room-acoustic plugins.
+
+<!-- begin:auto-docs -->
+## Packages in `audio-ir`
+
+4 packages.
+
+| Package | Description |
+|---|---|
+| [`@suaveplan/audio-ir-core`](./audio-ir-core/README.md) | Foundation contract for the `@suaveplan/audio-ir-*` family. Universal; zero `@suaveplan/audio-*` runtime deps. Every sibling package (`audio-ir-loader`, `audio… |
+| [`@suaveplan/audio-ir-loader`](./audio-ir-loader/README.md) | Pipeline package for the `@suaveplan/audio-ir-*` family. Composes `IrRegistry` (from `@suaveplan/audio-ir-core`), a `StorageUriResolver` (from `@suaveplan/stor… |
+| [`@suaveplan/audio-ir-room-plugin-club`](./audio-ir-room-plugin-club/README.md) | Original audio-ir content package. Ships two bundled room impulse responses (`club1.wav`, `club2.wav`) wired through the `@suaveplan/audio-ir-*` family. |
+| [`@suaveplan/audio-ir-room-plugin-pool`](./audio-ir-room-plugin-pool/README.md) | Original audio-ir content package. Ships a single `room`-family impulse response — `pool-outdoor-swimming-pool` — sourced from the outdoor-swimming-pool captur… |
+<!-- end:auto-docs -->