feat: corrective action framework + CLAUDE.md rewrite + v0.8.0 cleanup

- Extend shadow-detection with 3-layer corrective action framework:
  archetype shadows, system shadows (tunnel vision, echo chamber, etc.),
  and policy boundaries (checkpoints, budget gates, circuit breakers)
- Rewrite CLAUDE.md with proper guardrails (DO/DO NOT, skill writing rules,
  200-line max per skill, no bash pseudo-code in skills)
- Update plugin.json to v0.8.0 with consolidated 19-skill list
- Update README architecture tree and skills reference
- Update using-archeflow version string to v0.8.0 / 19 skills
- Remove 8 empty skill directories (absorbed into run skill)

.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "archeflow",
   "description": "Multi-agent orchestration with Jungian archetypes. PDCA quality cycles, shadow detection, git worktree isolation. Zero dependencies — works with any Claude Code session.",
-  "version": "0.7.0",
+  "version": "0.8.0",
   "author": {
     "name": "Chris Nennemann"
   },
@@ -14,12 +14,11 @@
     "shadow-detection", "workflows"
   ],
   "skills": [
-    "run", "orchestration", "plan-phase", "do-phase", "check-phase", "act-phase",
-    "shadow-detection", "convergence", "artifact-routing",
-    "process-log", "memory", "effectiveness", "progress",
-    "colette-bridge", "git-integration", "multi-project",
-    "custom-archetypes", "workflow-design", "domains", "cost-tracking",
-    "templates", "autonomous-mode", "using-archeflow", "presence"
+    "run", "sprint", "review", "check-phase", "act-phase",
+    "shadow-detection", "memory", "progress", "presence",
+    "colette-bridge", "git-integration", "multi-project", "cost-tracking",
+    "custom-archetypes", "workflow-design", "domains",
+    "templates", "autonomous-mode", "using-archeflow"
   ],
   "hooks": "hooks/hooks.json"
 }