Support for declarative build function callbacks in the Spring container

[KAMO030]

• 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();