// Package env provides utilities for reading environment variables with type safety
// and default values. It supports common Go types including strings, integers (all sizes),
// unsigned integers (all sizes), booleans, and time.Duration values.
//
// The package follows a simple pattern where each function takes a key name and a
// default value, returning the parsed environment variable or the default if the
// variable is not set or cannot be parsed.
//
// Example usage:
//
//	port := env.Int("PORT", 8080)
//	debug := env.Bool("DEBUG", false)
//	timeout := env.Duration("TIMEOUT", 30*time.Second)
//
// All functions gracefully handle missing environment variables by returning the
// provided default value. They also handle parsing errors by falling back to the
// default value.
package env