doc: introduce uv.uv_metrics_info() api

docs.md

@@ -3738,6 +3738,22 @@ time until calling `loop_configure` with `"metrics_idle_time"`.
 
 **Returns:** `number`
 
+### `uv.metrics_info()`
+
+Get the metrics table from current set of event loop metrics.
+
+**Returns:** `table`
+
+The table contains event loop metrics. It is recommended to retrieve these
+metrics in a uv_prepare_cb in order to make sure there are no inconsistencies
+with the metrics counters.
+
+- `loop_count` : `integer`
+- `events` : `integer`
+- `events_waiting` : `integer`
+
+**Note**: New in libuv version 1.45.0.
+
 ---
 
 [luv]: https://github.com/luvit/luv