initial: team agent workstation for 6-repo matrix

- Dockerfile (Node/Python/Go/Bun + claude-code + gh cli)
- docker-compose.yml (flexible REPOS_DIR, 7 mounts, 6 cache volumes)
- CLAUDE.md (team conventions + red lines + per-repo build/test cmds)
- .claude/settings.json (allow/deny permissions)
- Makefile + scripts/{enter,bootstrap,run-task}.sh
- README.md (onboarding guide)

.gitignore

@@ -0,0 +1,10 @@
+.env
+.env.local
+.claude/state/
+.claude/logs/
+.claude/sessions/
+.claude/projects/
+.claude/todos/
+.omc/
+*.log
+.DS_Store