Release: skill 4.0.4, CLI 3.5.0, extension 1.3.1

Version bumps for all three components plus the build:release sync of
the tracked harness dirs and the plugin subtree at 4.0.4, rebased onto
the composition-axes work so the release carries both threads.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "impeccable",
-  "version": "3.4.0",
+  "version": "3.5.0",
   "author": "Paul Bakaus",
   "description": "Design skills, commands, and anti-pattern detection for AI coding agents",
   "keywords": [