4.0.0 org.springframework.boot spring-boot-starter-parent 4.1.0 com.ankurm.ai spring-ai-2-migration 1.0.0 Spring AI 1.x to 2.0 migration 25 UTF-8 2.0.0 org.springframework.ai spring-ai-bom ${spring-ai.version} pom import org.springframework.boot spring-boot-starter org.springframework.ai spring-ai-client-chat org.springframework.boot spring-boot-starter-test test