add apimanager module catch-admin-vue files and README doc

catch/apimanager/catch-admin-vue/src/api/userenv.js

@@ -0,0 +1,7 @@
+import request from "@/utils/request";
+export function userenvList() {
+  return request({
+    url: "/apiTesterUserenv",
+    method: "get"
+  });
+}