feat(agent): agent相关cli命令的client层功能，对齐cli client的基础能力

packages/cli/.gitignore

@@ -2,4 +2,7 @@ node_modules
 dist
 *.log
 .DS_Store
-outputs/
+outputs/
+# agents
+agents.state.json
+.env

packages/cli/agents.yaml

@@ -0,0 +1,26 @@
+version: "1"
+
+providers:
+  bailian:
+    api_key: ${DASHSCOPE_API_KEY}
+    workspace_id: ${BAILIAN_WORKSPACE_ID}
+
+defaults:
+  provider: bailian
+
+environments:
+  dev:
+    config:
+      type: cloud
+      networking:
+        type: unrestricted
+
+agents:
+  assistant:
+    description: "General-purpose assistant"
+    model: qwen3.7-max
+    instructions: |
+      You are a helpful assistant.
+    environment: dev
+    tools:
+      builtin: [bash, read, glob, grep]