Docs: updates for file-based menu (#28500)

* initial

* cleanup

* remove bad aliases

* cleanup, fix links

* add docs-file-based-command

* update docs

* update readme

* fix broken links

* fix spelling

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

docs/sources/datasources/cloudmonitoring.md

@@ -2,11 +2,7 @@
 title = "Cloud Monitoring"
 description = "Guide for using Google Cloud Monitoring in Grafana"
 keywords = ["grafana", "stackdriver", "google", "guide", "cloud", "monitoring"]
-type = "docs"
 aliases = ["/docs/grafana/latest/features/datasources/stackdriver", "/docs/grafana/latest/features/datasources/cloudmonitoring/"]
-[menu.docs]
-name = "Google Cloud Monitoring"
-parent = "datasources"
 weight = 200
 +++