feat: add knowledge API docs

public/api/tools/TT125/usage.json

@@ -0,0 +1,15 @@
+{
+  "id": "TT125",
+  "name": "完工尚需绩效指数",
+  "usedIn": [
+    {
+      "id": "P4.4",
+      "name": "控制成本",
+      "knowledgeAreaId": "KA04",
+      "knowledgeAreaName": "项目成本管理",
+      "processGroupId": "PG04",
+      "processGroupName": "监控过程组",
+      "purpose": "在整个项目期间保持对成本基准的维护。本过程需要在整个项目期间开展。"
+    }
+  ]
+}