feat: Support OLLAMA provider

- Added OllamaClient to handle conversations with the Ollama API.
- Introduced OllamaDialect for managing thinking modes.
- Created data classes: OllamaFunctionCall, OllamaListedModel, OllamaMessage, OllamaShowRequest, OllamaShowResponse, OllamaTagsResponse, OllamaToolCall, OllamaToolDefinition, and OllamaToolFunction for structured API communication.
- Developed unit tests for OllamaClient to validate model listing, chat completion, streaming responses, and tool calling capabilities.
- Configured test properties for local Ollama instance.

src/test/resources/local-ollama-chatcompletion.properties

@@ -0,0 +1,16 @@
+category=OLLAMA
+prompts=
+tokenizer=fallback
+tokenEncoding=cl100k_base
+maxTokens=2500
+maxContextLength=32768
+temperature=0.3
+topP=0.95
+modelProvider=OLLAMA
+modelName=
+url=http://localhost:11434
+apiKey=
+cost1MInTokens=0
+cost1MCachedInTokens=0
+cost1MOutTokens=0
+cost1MReasoningOutTokens=0