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/image/colour-convert-cmyk/README.md

@@ -0,0 +1,32 @@
+# @suaveplan/colour-convert-cmyk - Bidirectional RGB <-> CMYK colour space conversion with black generation for print workflows
+
+Bidirectional conversion between RGB and CMYK colour spaces using the standard Euclidean algorithm with black generation. CMYK is the subtractive model used in professional printing; these conversions are essential for print preview, pre-press workflows, and bridging screen colours with physical output.
+
+<!-- begin:auto-docs -->
+## Documentation tree
+
+- [cmyk](./src/cmyk/cmyk.md) — `cmyk.ts` provides bidirectional conversion between RGB and CMYK colour spaces. CMYK is the subtractive model used in p…
+  - [cmyk](./src/cmyk/cmyk.md) — `cmyk.ts` provides bidirectional conversion between RGB and CMYK colour spaces. CMYK is the subtractive model used in p…
+<!-- end:auto-docs -->
+
+## Installation
+
+```bash
+bun add @suaveplan/colour-convert-cmyk
+```
+
+## Quick Start
+
+```ts
+import { rgbToCmyk, cmykToRgb } from "@suaveplan/colour-convert-cmyk";
+
+const ink = rgbToCmyk({ r: 59, g: 130, b: 246 });
+console.log(ink); // { c: 76, m: 47, y: 0, k: 4 }
+
+const screen = cmykToRgb(ink);
+console.log(screen); // { r: 59, g: 130, b: 246, a: 1 }
+```
+
+## Modules
+
+- [`src/cmyk/cmyk.md`](./src/cmyk/cmyk.md) — RGB↔CMYK conversion implementation and API reference