feat: add .architect/ project mapping system with architect-indexer agent and Docker containerization

- Add .architect/ directory structure (10 template files) as project brain for agent orientation
- Add architect-indexer agent that scans codebase and generates structured architecture docs
- Add Docker containerization: Dockerfile.architect-indexer, docker-compose.architect.yml
- Add TypeScript project-mapper module with staleness detection and context injection
- Add /index-project command, architect-first-contact rule, project-mapping skill
- Integrate orchestrator first-contact check: triggers indexing before any task delegation
- Add npm arch:* scripts for Docker-based indexing workflow
- Register agent in capability-index.yaml and AGENTS.md

.gitignore

@@ -3,6 +3,7 @@ package-lock.json
 .env
 *.log
 .DS_Store
+tsconfig.tsbuildinfo
 
 # Test artifacts (generated at runtime)
 tests/node_modules/
@@ -16,4 +17,9 @@ tests/reports/
 .kilo/logs/
 .kilo/reports/
 .kilo/EVOLUTION_LOG.md
-.kilo/WORKFLOW_AUDIT.md
+.kilo/WORKFLOW_AUDIT.md
+
+# Architect generated maps (can be large, auto-indexed)
+# Note: .architect/ md and json files ARE tracked for team orientation
+# Only maps/ with file graphs can be very large
+.architect/maps/