Spring-ai Add Ollama Function Call support

• extend the OllamaApi with Tool, ToolCalls and Function and add Tool Role.
• make OllamaChatModel extend the AbstractToolCallSupport.
• extend the OllamaChatModel to convert the Spring AI messages to OllamaApi messages, including Tools.
• OllamaOptions implements FunctionCallingOptions.
• add OllamaApiToolFunctionCallIT for testing function calling.
• patch the AbstractToolCallSupport#isToolCall to take set of stop resons.
• add FunctionCallbackInPromptIT and FunctionCallbackWrapperIT function calling auto-configuration tests.
• extend OllamAutoConfiguration to support function calling registration.
• add function call tests to OllamChatAutoConfigurationIT.
• add OllamaWithOpenAiChatModelIT to OpenAi that uses the OpenAI API to call Ollama.
• move buildToolCallConversation and handleToolCalls to parent AbstractToolCallSupport.
• update Docs. add Ollama function call docs.
• update Ollama diagrams.

Resolves #720

Comment From: ThomasVitale

Super!

Comment From: markpollack

addressed comments and made other minor cosmetic changes, merged in d53876a6244a71efb471f3934c4e1dcf08268b2a