ollamar 1.2.2

generate() and chat() support structured output via format parameter.
test_connection() returns httr2::response object by default, but also support returning a logical value. #29
chat() supports tool calling via tools parameter. Added get_tool_calls() helper function to process tools. #30
Simplify README and add Get started vignette with more examples.

ollamar 1.2.1

generate() and chat() accept multiple images as prompts/messages.
Add functions to validate messages for chat() function: validate_message(), validate_messages().
Add encode_images_in_messages() to encode images in messages for chat() function.
Add create_messages() to create messages easily.
Helper functions for managing messages accept ... parameter to pass additional options.
Update README and docs to reflect changes.

All functions calling API endpoints have endpoint parameter.
All functions calling API endpoints have ... parameter to pass additional model options to the API.
All functions calling API endpoints have host parameter to specify the host URL. Default is NULL, which uses the default Ollama URL.
Add req as an output format for generate() and chat().
Add new functions for calling APIs: create(), show(), copy(), delete(), push(), embed() (supercedes embeddings()), ps().
Add helper functions to manipulate chat/conversation history for chat() function (or other APIs like OpenAI): create_message(), append_message(), prepend_message(), delete_message(), insert_message().
Add ohelp() function to chat with models in real-time.
Add helper functions: model_avail(), image_encode_base64(), check_option_valid(), check_options(), search_options(), validate_options()

Integrate R with Ollama to run language models locally on your own machine.
Include test_connection(logical = TRUE) function to test connection to Ollama server.
Include list_models() function to list available models.
Include pull() function to pull a model from Ollama server.
Include delete() function to delete a model from Ollama server.
Include chat() function to chat with a model.
Include generate() function to generate text from a model.
Include embeddings() function to get embeddings from a model.
Include resp_process() function to process httr2_response objects.