Docs: update content to work with website repo (#20693)

Updates the docs to work with the website repo - mainly 
relative link updates.
Adds a menu.yaml file to build the sidebar menu (no longer 
using front matter weight).

docs/sources/reference/annotations.md

@@ -17,7 +17,7 @@ you can get event description and event tags. The text field can include links t
 
 ## Native annotations
 
-Grafana v4.6+ comes with a native annotation store and the ability to add annotation events directly from the graph panel or via the [HTTP API]({{< relref "http_api/annotations.md" >}}).
+Grafana v4.6+ comes with a native annotation store and the ability to add annotation events directly from the graph panel or via the [HTTP API]({{< relref "annotations.md" >}}).
 
 ## Adding annotations
 
@@ -69,10 +69,10 @@ to show.
 
 The annotation query options are different for each data source.
 
-- [Graphite annotation queries]({{< relref "features/datasources/graphite.md#annotations" >}})
-- [Elasticsearch annotation queries]({{< relref "features/datasources/elasticsearch.md#annotations" >}})
-- [InfluxDB annotation queries]({{< relref "features/datasources/influxdb.md#annotations" >}})
-- [Prometheus annotation queries]({{< relref "features/datasources/prometheus.md#annotations" >}})
-- [MySQL annotation queries]({{< relref "features/datasources/mysql.md#annotations" >}})
-- [Postgres annotation queries]({{< relref "features/datasources/postgres.md#annotations" >}})
-- [Loki annotation queries]({{< relref "features/datasources/loki.md#annotations" >}})
+- [Graphite annotation queries]({{< relref "../features/datasources/graphite.md#annotations" >}})
+- [Elasticsearch annotation queries]({{< relref "../features/datasources/elasticsearch.md#annotations" >}})
+- [InfluxDB annotation queries]({{< relref "../features/datasources/influxdb.md#annotations" >}})
+- [Prometheus annotation queries]({{< relref "../features/datasources/prometheus.md#annotations" >}})
+- [MySQL annotation queries]({{< relref "../features/datasources/mysql.md#annotations" >}})
+- [Postgres annotation queries]({{< relref "../features/datasources/postgres.md#annotations" >}})
+- [Loki annotation queries]({{< relref "../features/datasources/loki.md#annotations" >}})

docs/sources/reference/share_panel.md

@@ -32,7 +32,7 @@ https://play.grafana.org/d/000000012/grafana-play-home?orgId=1&from=156871968017
 
 You can embed a panel using an iframe on another web site. This tab will show you the html that you need to use.
 
-> *Notice* This sharing require either anonymous access or setting [cookie_samesite]({{< relref "installation/configuration.md#cookie-samesite" >}}) to none
+> *Notice* This sharing require either anonymous access or setting [cookie_samesite]({{< relref "../installation/configuration.md#cookie-samesite" >}}) to none
 
 Example:
 

docs/sources/reference/templating.md

@@ -236,11 +236,11 @@ demo.robustperception.io:9100
 
 The query expressions are different for each data source.
 
-- [Graphite templating queries]({{< relref "features/datasources/graphite.md#templating" >}})
-- [Elasticsearch templating queries]({{< relref "features/datasources/elasticsearch.md#templating" >}})
-- [InfluxDB templating queries]({{< relref "features/datasources/influxdb.md#templating" >}})
-- [Prometheus templating queries]({{< relref "features/datasources/prometheus.md#templating" >}})
-- [OpenTSDB templating queries]({{< relref "features/datasources/opentsdb.md#templating" >}})
+- [Graphite templating queries]({{< relref "../features/datasources/graphite.md#templating" >}})
+- [Elasticsearch templating queries]({{< relref "../features/datasources/elasticsearch.md#templating" >}})
+- [InfluxDB templating queries]({{< relref "../features/datasources/influxdb.md#templating" >}})
+- [Prometheus templating queries]({{< relref "../features/datasources/prometheus.md#templating" >}})
+- [OpenTSDB templating queries]({{< relref "../features/datasources/opentsdb.md#templating" >}})
 
 One thing to note is that query expressions can contain references to other variables and in effect create linked variables.
 Grafana will detect this and automatically refresh a variable when one of it's containing variables change.