feat(skills): add multi-agent-mux-loop autonomous loop orchestrator

Implement a new autonomous planning-execution-review orchestration loop
supporting:
- Collaborative planning & creator-planner challenge discussions (--plan-talk)
- Self-planning and self-review fallbacks
- Custom reviewer target list and all-reviewer unanimous PASS verdicts
- API-cost runaway safety limits via --max-loop

Integrated inside deploy/install.sh checklist and deploy/gitea-ci.yml.

deploy/install.sh

@@ -66,6 +66,7 @@ check_assets_present() {
     ".agents/skills/multi-agent-mux-create/scripts/create_session.sh"
     ".agents/skills/multi-agent-mux-delegate-job/scripts/registry.py"
     ".agents/skills/multi-agent-mux-status/scripts/status.sh"
+    ".agents/skills/multi-agent-mux-loop/scripts/run_loop.sh"
   )
   for f in "${core_files[@]}"; do
     if [ ! -f "$dir/$f" ]; then