chore: Ollama setup

src/Command/OllamaChat.php

src/Command/OllamaGenerate.php

src/Command/OllamaGenerate/Completion.php

src/Command/OllamaGenerate/Embedding.php

src/OllamaChatMessage.php

src/OllamaChatRequest.php

src/OllamaChatRole.php

src/OllamaChatSession.php

src/OllamaChatToken.php

src/OllamaClient.php

src/OllamaCompletionToken.php

src/OllamaRequestOptions.php