doc<metrics>: update docs for metrics

docs/en_US/cli/rules.md

@@ -155,8 +155,8 @@ rule rule1 restarted
 
 ## get the status of a rule
 
-The command is used to get the status of the rule. The status can be
-- running
+The command is used to get the status of the rule. If the rule is running, the metrics will be retrieved realtime. The status can be
+- running with metrics: $metrics
 - stopped: $reason
 
 ```shell
@@ -167,5 +167,13 @@ Sample:
 
 ```shell
 # bin/cli getstatus rule rule1
-running
+running with metrics:
+{
+    "kuiper_op_filter_0_exceptions_total":0,
+    "kuiper_op_filter_0_last_invocation":“2019-12-20 14:19:14.2084027 +0800 CST m=+2.693030901",
+    "kuiper_op_filter_0_process_latency_ms":0,
+    "kuiper_op_filter_0_records_in_total":2,
+    "kuiper_op_filter_0_records_out_total":2,
+    ... 
+}
 ```

docs/zh_CN/cli/rules.md

@@ -156,7 +156,7 @@ rule rule1 restarted
 ## 获取规则的状态
 
 该命令用于获取规则的状态。 状态可以是
-- 运行
+- 运行: $metrics
 - 停止: $reason
 
 ```shell
@@ -167,5 +167,13 @@ getstatus rule $rule_name
 
 ```shell
 # bin/cli getstatus rule rule1
-running
+running with metrics:
+{
+    "kuiper_op_filter_0_exceptions_total":0,
+    "kuiper_op_filter_0_last_invocation":“2019-12-20 14:19:14.2084027 +0800 CST m=+2.693030901",
+    "kuiper_op_filter_0_process_latency_ms":0,
+    "kuiper_op_filter_0_records_in_total":2,
+    "kuiper_op_filter_0_records_out_total":2,
+    ... 
+}
 ```