v0.1.2: Launch release

• Initial release of LLM Nexus
• Unified interface for multiple LLM providers (OpenAI, Anthropic, Google AI)
• Support for text completions across all providers
• Support for function calls across all providers
• ModelProvider class for easy interaction with different LLM providers
• Comprehensive test suite for all main functionalities
• Basic logging system
• Support for Python 3.7 and above

Full Changelog: https://github.com/dtedesco1/llm_nexus/commits/v0.1.2