Create Languages section

Issue: SPR-16044

Author: rstoyanchev

src/docs/asciidoc/core/core-beans.adoc

@@ -3868,7 +3868,7 @@ Notice how the `InstantiationTracingBeanPostProcessor` is simply defined. It doe
 even have a name, and because it is a bean it can be dependency-injected just like any
 other bean. (The preceding configuration also defines a bean that is backed by a Groovy
 script. The Spring dynamic language support is detailed in the chapter entitled
-<<integration.adoc#dynamic-language, Dynamic language support>>.)
+<<languages.adoc#dynamic-language, Dynamic language support>>.)
 
 The following simple Java application executes the preceding code and configuration:
 

src/docs/asciidoc/core/core-null-safety.adoc

@@ -40,7 +40,7 @@ at runtime.
 
 They are also used to make Spring API null-safe in Kotlin projects since Kotlin natively
 supports https://kotlinlang.org/docs/reference/null-safety.html[null-safety]. More details
-are available in <<kotlin#null-safety,Kotlin support documentation>>.
+are available in <<languages#kotlin-null-safety,Kotlin support documentation>>.
 
 == JSR 305 meta-annotations
 

src/docs/asciidoc/index.adoc

@@ -22,5 +22,5 @@ ORM, Marshalling XML.
 <<web-reactive.adoc#spring-webflux,Web Reactive>> :: Spring WebFlux,
 WebClient, WebSocket.
 <<integration.adoc#spring-integration,Integration>> :: Remoting, JMS, JCA, JMX, Email,
-Tasks, Scheduling, Cache, Dynamic languages.
-<<kotlin.adoc#kotlin,Kotlin>> :: Extensions, Bean Definition DSL, WebFlux DSL.
+Tasks, Scheduling, Cache.
+<<languages.adoc#languages,Languages>> :: Kotlin, Groovy, Dynamic languages.

src/docs/asciidoc/integration-appendix.adoc

@@ -258,35 +258,6 @@ After...
 
 
 
-[[xsd-schemas-lang]]
-=== The lang schema
-
-The `lang` tags deal with exposing objects that have been written in a dynamic language
-such as JRuby or Groovy as beans in the Spring container.
-
-These tags (and the dynamic language support) are comprehensively covered in the chapter
-entitled <<integration.adoc#dynamic-language,Dynamic language support>>.
-Please do consult that chapter for full details on this support and the `lang` tags themselves.
-
-In the interest of completeness, to use the tags in the `lang` schema, you need to have
-the following preamble at the top of your Spring XML configuration file; the text in the
-following snippet references the correct schema so that the tags in the `lang` namespace
-are available to you.
-
-[source,xml,indent=0]
-[subs="verbatim,quotes"]
-----
-	<?xml version="1.0" encoding="UTF-8"?>
-	<beans xmlns="http://www.springframework.org/schema/beans"
-		xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-		__xmlns:lang="http://www.springframework.org/schema/lang"__ xsi:schemaLocation="
-			http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
-			__http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd"__> <!-- bean definitions here -->
-
-	</beans>
-----
-
-
 
 [[xsd-schemas-jms]]
 === The jms schema