Add programmatic configuration code snippet

- Extract code examples to separate Java, Kotlin, and XML files
- Add Kotlin configuration sample alongside Java
- Change "Java Config" terminology to "Programmatic Configuration"
- Use include-code directive for better maintainability

See gh-36323
Signed-off-by: jisub-dev <kimjiseob1209@gmail.com>

framework-docs/src/main/java/org/springframework/docs/dataaccess/transaction/declarative/annotations/AppConfig.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2002-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.docs.dataaccess.transaction.declarative.annotations;
+
+import javax.sql.DataSource;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.datasource.DataSourceTransactionManager;
+import org.springframework.transaction.PlatformTransactionManager;
+import org.springframework.transaction.annotation.EnableTransactionManagement;
+
+// tag::snippet[]
+@Configuration
+@EnableTransactionManagement
+public class AppConfig {
+
+	@Bean
+	public FooService fooService() {
+		return new DefaultFooService();
+	}
+
+	@Bean
+	public PlatformTransactionManager txManager(DataSource dataSource) {
+		return new DataSourceTransactionManager(dataSource);
+	}
+}
+// end::snippet[]

framework-docs/src/main/kotlin/org/springframework/docs/dataaccess/transaction/declarative/annotations/AppConfig.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2002-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.docs.dataaccess.transaction.declarative.annotations
+
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+import org.springframework.jdbc.datasource.DataSourceTransactionManager
+import org.springframework.transaction.PlatformTransactionManager
+import org.springframework.transaction.annotation.EnableTransactionManagement
+import javax.sql.DataSource
+
+// tag::snippet[]
+@Configuration
+@EnableTransactionManagement
+class AppConfig {
+
+	@Bean
+	fun fooService(): FooService {
+		return DefaultFooService()
+	}
+
+	@Bean
+	fun txManager(dataSource: DataSource): PlatformTransactionManager {
+		return DataSourceTransactionManager(dataSource)
+	}
+}
+// end::snippet[]

framework-docs/src/main/resources/org/springframework/docs/dataaccess/transaction/declarative/annotations/annotations-tx.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- tag::snippet[] -->
+<beans xmlns="http://www.springframework.org/schema/beans"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns:aop="http://www.springframework.org/schema/aop"
+	xmlns:tx="http://www.springframework.org/schema/tx"
+	xsi:schemaLocation="
+		http://www.springframework.org/schema/beans
+		https://www.springframework.org/schema/beans/spring-beans.xsd
+		http://www.springframework.org/schema/tx
+		https://www.springframework.org/schema/tx/spring-tx.xsd
+		http://www.springframework.org/schema/aop
+		https://www.springframework.org/schema/aop/spring-aop.xsd">
+
+	<!-- this is the service object that we want to make transactional -->
+	<bean id="fooService" class="x.y.service.DefaultFooService"/>
+
+	<!-- enable the configuration of transactional behavior based on annotations -->
+	<!-- a TransactionManager is still required -->
+	<tx:annotation-driven transaction-manager="txManager"/> <!--1-->
+
+	<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
+		<!-- (this dependency is defined somewhere else) -->
+		<property name="dataSource" ref="dataSource"/>
+	</bean>
+
+	<!-- other <bean/> definitions here -->
+
+</beans>
+<!-- end::snippet[] -->