add clear link to api docs

docsite/docs/api.md

@@ -0,0 +1,3 @@
+# API
+
+Monitor Core exposes an http API to read data, write configuration, and execute actions. The API documentation is generated from the code and is [available here](https://docs.rs/monitor_client/latest/monitor_client/api/index.html).

docsite/sidebars.ts

@@ -57,7 +57,7 @@ const sidebars: SidebarsConfig = {
     },
     "sync-resources",
     "permissioning",
-    "file-paths",
+    "api",
   ],
 };