Introduce generate method into ollama model provider#4

SasinduDilshara merged 4 commits intoballerina-platform:intro-generate-methodballerina-platform/module-ballerinax-ai.ollama:intro-generate-methodfrom

SasinduDilshara:mainSasinduDilshara/module-ballerinax-ai.ollama:mainCopy head branch name to clipboard