Spring-ai Support for declarative build function callbacks in the Spring container

• add FunctionCallbackMethodProcessor to support parsing.
• add the FunctionCalling annotation to declare
• add FunctionCallbackMethodProcessorIT as test

Dependent on https://github.com/spring-projects/spring-ai/pull/1099

define:

public  class FunctionCallConfig {
        @FunctionCalling(name = "dateTime", description = "get the current date and time")
        public String dateTime(String location) {
            return location + " dateTime:" + LocalDateTime.now();
        }
}

use:

client.prompt().user("What is the time in New York?").functions("dateTime").call().content();