Add deepseek reasoner model#2

MohamedSabthar merged 1 commit intoballerina-platform:mainballerina-platform/module-ballerinax-ai.deepseek:mainfrom

MohamedSabthar:mainMohamedSabthar/module-ballerinax-ai.model.provider.deepseek:mainCopy head branch name to clipboard