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/dashboards/export-import.md

@@ -1,10 +1,7 @@
 +++
 title = "Export and import"
 keywords = ["grafana", "dashboard", "documentation", "export", "import"]
-type = "docs"
 aliases = ["/docs/grafana/latest/reference/export_import/"]
-[menu.docs]
-parent = "dashboard_features"
 weight = 800
 +++
 
@@ -30,7 +27,7 @@ the dashboard, and will also be added as a required input when the dashboard is
 
 ## Importing a dashboard
 
-To import a dashboard click the + icon in the side menu, and then click **Import**. 
+To import a dashboard click the + icon in the side menu, and then click **Import**.
 
 {{< docs-imagebox img="/img/docs/v70/import_step1.png" max-width="700px" >}}