docs(http_api): convert to new docs format

docs/sources/http_api/admin.md

-----
-page_title: Admin APIs
-page_description: Grafana Admin API Reference
-page_keywords: grafana, admin, http, api, documentation
----
++++
+title = "Admin HTTP API "
+description = "Grafana Admin HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "admin"]
+aliases = ["/http_api/admin/"]
+type = "docs"
+[menu.docs]
+name = "Admin"
+parent = "http_api"
++++
 
 # Admin API
 

docs/sources/http_api/auth.md

-----
-page_title: Authentication API
-page_description: Grafana HTTP API Reference
-page_keywords: grafana, admin, http, api, documentation
----
++++
+title = "Authentication HTTP API "
+description = "Grafana Authentication HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "authentication"]
+aliases = ["/http_api/authentication/"]
+type = "docs"
+[menu.docs]
+name = "Authentication"
+parent = "http_api"
++++
 
 # Authentication API
 

docs/sources/http_api/dashboard.md

-----
-page_title: Dashboard API
-page_description: Grafana Dashboard API Reference
-page_keywords: grafana, admin, http, api, documentation, dashboard
----
++++
+title = "Dashboard HTTP API "
+description = "Grafana Dashboard HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "dashboard"]
+aliases = ["/http_api/dashboard/"]
+type = "docs"
+[menu.docs]
+name = "Dashboard"
+parent = "http_api"
++++
 
 # Dashboard API
 

docs/sources/http_api/data_source.md

-----
-page_title: Data source API
-page_description: Grafana Data source API Reference
-page_keywords: grafana, admin, http, api, documentation, datasource
----
++++
+title = "Data source HTTP API "
+description = "Grafana Data source HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "data source"]
+aliases = ["/http_api/datasource/"]
+type = "docs"
+[menu.docs]
+name = "Data source"
+parent = "http_api"
++++
+
 
 # Data source API
 

docs/sources/http_api/org.md

-----
-page_title: Organisation API
-page_description: Grafana Organisation API Reference
-page_keywords: grafana, admin, http, api, documentation, orgs, organisation
----
++++
+title = "Organisation HTTP API "
+description = "Grafana Organisation HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "organisation"]
+aliases = ["/http_api/organisation/"]
+type = "docs"
+[menu.docs]
+name = "Organisation"
+parent = "http_api"
++++
+
 
 # Organisation API
 

docs/sources/http_api/other.md

-----
-page_title: Other APIs
-page_description: Grafana Other API Reference
-page_keywords: grafana, admin, http, api, documentation, dashboards
----
++++
+title = "Other HTTP API "
+description = "Grafana Other HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "other"]
+aliases = ["/http_api/other/"]
+type = "docs"
+[menu.docs]
+name = "Other"
+parent = "http_api"
++++
+
 
 # Frontend Settings API
 

docs/sources/http_api/overview.md

-----
-page_title: HTTP API
-page_description: Grafana HTTP API Reference
-page_keywords: grafana, admin, http, api, documentation
----
++++
+title = "HTTP API "
+description = "Grafana HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "overview"]
+aliases = ["/http_api/overview/"]
+type = "docs"
+[menu.docs]
+name = "Overview"
+parent = "http_api"
++++
+
 
 # HTTP API Reference
 
 The Grafana backend exposes an HTTP API, the same API is used by the frontend to do everything from saving
 dashboards, creating users and updating data sources.
 
-###Supported HTTP APIs:
+## Supported HTTP APIs:
 
 * [Authentication API](/http_api/auth/)
 * [Dashboard API](/http_api/dashboard/)

docs/sources/http_api/preferences.md

-----
-page_title: Preferences API
-page_description: Grafana Preferences API Reference
-page_keywords: grafana, preferences, http, api, documentation
----
++++
+title = "HTTP Preferences API "
+description = "Grafana HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "preferences"]
+aliases = ["/http_api/preferences/"]
+type = "docs"
+[menu.docs]
+name = "Preferences"
+parent = "http_api"
++++
 
 # User and Org Preferences API
 

docs/sources/http_api/snapshot.md

-----
-page_title: Snapshot API
-page_description: Grafana Snapshot API Reference
-page_keywords: grafana, admin, http, api, documentation, snapshot, dashboard
----
++++
+title = "HTTP Snapshot API "
+description = "Grafana HTTP API"
+keywords = ["grafana", "http", "documentation", "api", "snapshot"]
+aliases = ["/http_api/snapshot/"]
+type = "docs"
+[menu.docs]
+name = "Snapshot"
+parent = "http_api"
++++
 
 # Snapshot API