docs: Replaces indexed script java api docs with stored script api docs

Closes #28144

Author: martijnvg

docs/java-api/admin/cluster/index.asciidoc

@@ -13,3 +13,4 @@ In the rest of this guide, we will use `client.admin().cluster()`.
 
 include::health.asciidoc[]
 
+include::stored-scripts.asciidoc[]

docs/java-api/admin/cluster/stored-scripts.asciidoc

@@ -0,0 +1,29 @@
+[[stored-scripts]]
+==== Stored Scripts API
+
+The stored script API allows one to interact with scripts and templates
+stored in Elasticsearch. It can be used to create, update, get,
+and delete stored scripts and templates.
+
+[source,java]
+--------------------------------------------------
+PutStoredScriptResponse response = client.admin().cluster().preparePutStoredScript()
+                .setId("script1")
+                .setContent(new BytesArray("{\"script\": {\"lang\": \"painless\", \"source\": \"_score * doc['my_numeric_field'].value\"} }"), XContentType.JSON)
+                .get();
+
+GetStoredScriptResponse response = client().admin().cluster().prepareGetStoredScript()
+                .setId("script1")
+                .get();
+
+DeleteStoredScriptResponse response = client().admin().cluster().prepareDeleteStoredScript()
+                .setId("script1")
+                .get();
+--------------------------------------------------
+
+To store templates simply use "mustache" for the scriptLang.
+
+===== Script Language
+
+The put stored script API allows one to set the language of the stored script.
+If one is not provided the default scripting language will be used.

docs/java-api/index.asciidoc

@@ -216,6 +216,4 @@ include::aggs.asciidoc[]
 
 include::query-dsl.asciidoc[]
 
-include::indexed-scripts.asciidoc[]
-
 include::admin/index.asciidoc[]