Support more application context types with function calling

[dominik5566]

I try to get "function calling" running with the OpenAi model, but currently this seems impossible, because I cannot create a FunctionCallbackContext which is part of spring-ai-core. The "FunctionCallbackContext" is ApplicationContextAware but explicitly casts the applicationContext to a "GenericApplicationContext".

@Override
public void setApplicationContext(@NonNull ApplicationContext applicationContext) throws BeansException {
		this.applicationContext = (GenericApplicationContext) applicationContext;
}

Any plans to make the library more flexible? We use XmlWebApplicationContext so we get a ClassCastException here