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/installation/upgrading.md

@@ -2,11 +2,6 @@
 title = "Upgrade Grafana"
 description = "Guide for upgrading Grafana"
 keywords = ["grafana", "configuration", "documentation", "upgrade"]
-type = "docs"
-[menu.docs]
-name = "Upgrade Grafana"
-identifier = "upgrading"
-parent = "installation"
 weight = 700
 +++