v0.0.4 - Informix Rust

Features:
- Rust bindings for Informix CSDK (Client Software Development Kit)
- Safe connection handling with detailed error reporting
- SQL statement preparation and direct execution
- Parameter binding support for i32, str, String, and NaiveDate types
- Result fetching with proper NULL value handling
- Higher-level Cursor abstraction for simplified database interactions
- Support for SQLDriverConnect allowing flexible connection string options
- Comprehensive error handling with informative error messages
- RAII-compliant memory management for Connection and Statement objects
- Low-level FFI declarations for core CSDK functions