feat: add knowledge API docs

public/api/artifacts/A038/usage.json

@@ -0,0 +1,16 @@
+{
+  "id": "A038",
+  "name": "持续时间估算",
+  "asInput": [],
+  "asOutput": [
+    {
+      "id": "P3.4",
+      "name": "估算活动持续时间",
+      "knowledgeAreaId": "KA03",
+      "knowledgeAreaName": "项目进度管理",
+      "processGroupId": "PG02",
+      "processGroupName": "规划过程组",
+      "purpose": "确定完成每个活动所需花费的时间量。本过程需要在整个项目期间开展。"
+    }
+  ]
+}