Add /api-docs to make them easier to find (#5190)

Signed-off-by: svrnm <[email protected]>

content/en/api-docs.md

@@ -0,0 +1,16 @@
+---
+title: API Documentation
+linkTitle: Docs
+cSpell:ignore: apidocs
+---
+
+{{% blocks/section color="white" %}}
+
+## {{% param title %}}
+
+Below you will find links to all the API references available for the different
+implementations of the OpenTelemetry API & SDK
+
+{{% apidocs %}}
+
+{{% /blocks/section %}}

layouts/shortcodes/apidocs.md

@@ -0,0 +1,19 @@
+{{ $pages := slice }}
+{{ range $key,$value := $.Site.Data.instrumentation -}}
+    {{ if eq $key "dotnet" -}}
+    {{ with $.Site.GetPage "/docs/languages/net/traces-api" -}}
+        {{ $pages = $pages | append (dict "lang" $value "page" .) }}
+    {{ end }}
+    {{ with $.Site.GetPage "/docs/languages/net/metrics-api" -}}
+        {{ $pages = $pages | append (dict "lang" $value "page" .) }}
+    {{ end }}
+    {{ else -}}
+    {{ with $.Site.GetPage (printf "/docs/languages/%s/api" $key) -}}
+        {{ $pages = $pages | append (dict "lang" $value "page" .) }}
+    {{ end }}
+    {{ end -}}
+{{ end -}}
+
+{{ range $pages }}
+* [{{ .lang.name }} — {{ .page.Title }}]({{ .page.Permalink }})
+{{ end -}}