Docs: Add strategies topic (#26103)

* Create use.md

* Update timeseries.md

* changed file name and added content

* Update menu.yaml

* Update strategies.md

docs/sources/getting-started/timeseries.md

@@ -3,8 +3,8 @@ title = "Time series"
 description = "Introduction to time series"
 keywords = ["grafana", "intro", "guide", "concepts", "timeseries"]
 type = "docs"
-[menu.docs]
 aliases = ["/docs/grafana/latest/guides/timeseries"]
+[menu.docs]
 name = "Time series"
 identifier = "time_series"
 parent = "guides"