Remove old conceptsoverview page + move index to proper place in sidebar (#6196)

documentation/docs/components/outputs/api-scraping-outputs/time-now.md

@@ -1 +1 @@
-Wednesday, November 12th 2025, 11:13:44 UTC
+Thursday, November 13th 2025, 11:23:33 UTC

documentation/docs/components/outputs/command-outputs/node-api-check-query-help.md

@@ -11,7 +11,7 @@ options:
   --no_routing_history  Display node stats without routing history
   --no_verloc_metrics   Display node stats without verloc metrics
   -m, --markdown        Display results in markdown format
-  -o [OUTPUT], --output [OUTPUT]
+  -o, --output [OUTPUT]
                         Save results to file (in current dir or supply with
                         path without filename)
 ```

documentation/docs/pages/developers/_meta.json

@@ -1,4 +1,5 @@
 {
+  "index": "Introduction",
   "--": {
     "type": "separator",
     "title": "Mixnet Integrations"