fix(skill): bundle detector config dependency so critique runs (#254)

The bundled detector's cli/main.mjs imports ../../lib/impeccable-config.mjs,
which in the source CLI resolves to cli/lib/impeccable-config.mjs. The skill
build only copies cli/engine/** into scripts/detector/**, leaving that
dependency behind, so from the bundled scripts/detector/cli/main.mjs the same
import resolved to scripts/lib/impeccable-config.mjs and failed with
"Cannot find module .../lib/impeccable-config.mjs". /impeccable critique (and
any detector-backed command) crashed on startup for every provider since #252.

Teach the detector bundler to copy out-of-bundle engine dependencies into the
skill's scripts/lib/, and add a build test that walks every bundled script and
asserts each relative import resolves to another bundled file, so a future
out-of-bundle dependency fails the test instead of the user.

Skill v3.7.1 (patch). CLI unchanged — the engine resolves fine in the CLI's
own tree; only the skill bundling was wrong.

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

plugin/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "impeccable",
   "description": "Design fluency for frontend development. 1 skill with 23 commands (/impeccable polish, /impeccable audit, /impeccable critique, etc.) and curated anti-pattern detection.",
-  "version": "3.7.0",
+  "version": "3.7.1",
   "author": {
     "name": "Paul Bakaus",
     "email": "paul@paulbakaus.com"