feat: initial OpenClaw agent configuration

- openclaw.json: main config with all agent definitions
- agents/*/agent/models.json: per-agent model configs
- agents/*/agent/plugins/: plugin catalog configs

.gitignore

@@ -0,0 +1,26 @@
+# SQLite 数据库
+*.sqlite
+*.sqlite-shm
+*.sqlite-wal
+
+# 会话数据
+agents/*/sessions/
+devices/
+
+# 敏感配置
+exec-approvals.json
+
+# 日志
+logs/
+npm/
+sandboxes/
+
+# 备份文件
+*.bak*
+*.clobbered.*
+*.last-good
+*.pre-*
+
+# 系统文件
+.DS_Store
+Thumbs.db