Spring-ai Provide Anthropic Claude streaming Function Calling support

Fix #930

Comment From: tzolov

rebased, squashed and merged at f5b72242c03fd52688dcc3d741a188019e07170b

Comment From: tzolov

Thank you for the contribution @didalgolab,

I've merged your PR and then tried to improve the Anthropic stream handing with https://github.com/spring-projects/spring-ai/pull/995

Feel free to review it.