v1.0.0

Inital release of cgr::Date — a simple C++20 date library.

Features

• Date construction from day/month/year, string and epoch time
• Getters (day, month, year, day of year, weekday, ISO week)
• Setter chaining
• Arithmetic operations (add, subtract, increment, decrement)
• Comparison operators
• Stream extraction and insertion
• Leap year query
• Random date generation
• Exception-based error handling with reason codes