Initial Public Release (v0.1.0)

This is the first public release of the Go specifications package, providing a clean and flexible approach to defining and composing domain-driven query criteria. The package implements a visitor-based Specification pattern, allowing you to:

• Define conditions using Equal, NotEqual, GreaterThan, LowerThan, Like, In, Between, and others.
• Combine multiple specs with logical operators (And, Or).
• Apply query modifiers like Limit, Offset, and OrderBy.
• Keep domain logic separate from database schema details by using conceptual field names in the domain layer and mapping them to actual columns in the repository layer.
• Translate specifications into executable PostgreSQL queries via the included postgres visitor.

Highlights in v0.1.0:

• Core Specification and SpecificationVisitor interfaces.
• Common conditions (Equal, In, Like, GreaterThan/LowerThan, NotEqual).
• Support for logical composition (And, Or).
• Basic query modifiers: Limit, Offset, OrderBy.
• PostgreSQL visitor with parameterized query generation.
• Example usage patterns and recommended project structure included in the README.

This initial release aims to gather feedback, test real-world integration, and pave the way toward a stable v1.0.0 release. Your contributions, issues, and PRs are welcome!