refactor: Extract vector store and advisor functionality from spring-ai-core

Major Changes:
- Created new module spring-ai-vector-store from spring-ai-core functionality
- Split advisor functionality into three new modules:
  * advisor-memory: Memory-based chat advisors
  * advisor-rag: Retrieval Augmentation Generation advisors
  * advisor-vector-store: Vector store based advisors

models/spring-ai-openai/pom.xml

@@ -81,6 +81,13 @@
 		</dependency>
 
 		<!-- test dependencies -->
+
+		<dependency>
+			<groupId>org.springframework.ai</groupId>
+			<artifactId>spring-ai-vector-store</artifactId>
+			<version>${project.parent.version}</version>
+		</dependency>
+
 		<dependency>
 			<groupId>org.springframework.ai</groupId>
 			<artifactId>spring-ai-test</artifactId>