Release: Core Driver Contract, Statement Execution, and Placeholder Validation

[hebertcisco]

Description

This pull request merges the latest features from the develop branch into main. It introduces the foundational internal driver contract for GDO, establishes statement execution APIs, and significantly improves how placeholders are parsed and validated.

Key Changes

• Internal Driver Contract: Defined DriverContract and connection state management, including the initial integration for SQLite driver management.
• Statement Execution APIs: Added APIs for statement execution and connection-level queries. Enhanced the Statement type with backend management and binding implementation.
• Placeholder Parsing: Enhanced placeholder parsing and validation with robust state management.
• Execution Results: Defined specific execution result types for write and read operations.
• Testing & Refactoring: Added tests for connection preparation using the new driver contract and performed minor code readability improvements.

Linked Issues

• Closes Define execution result types for write and read operations #1 - Define execution result types for write and read operations
• Closes Add statement execution and connection-level query APIs #2 - Add statement execution and connection-level query APIs
• Closes Improve placeholder parsing and validation #3 - Improve placeholder parsing and validation
• Closes Define the internal driver contract for GDO #4 - Define the internal driver contract for GDO