Add OllamOptions that can be used as a builder (withX) and spring propererites (e.g. getX/setX).
- prvides strongly typed properties.
- the 'OllamaOptsion#toMap()' converts the options into Map<String, Object>.
- Add OllamaEmbeddingAutoConfiguraiton#options property of type OllamaOptions.
- Add OllamaChatAutoConfiguraiton#options property of type OllamaOptions.
- Factor out the baseUrl property into a standalone OllamConnectionProperties shared
between the Chat and Embedding autoconfigurations.
- Fix affected unit/IT tests.