Feature additions, route constraints, and unit tests

• Introduced new where constraint methods including whereAnything(), whereTwoSegments(), whereDate(), whereYearMonth(), whereEmail(), whereUuid(), and whereBool() for route parameter validation.
• Implemented flexible string matching and constraint handling for route parameters.
• Added comprehensive unit tests for route matching using various complex constraints, including base64-encoded random strings.
• Enhanced route handling with new pattern matching logic for complex and multi-segment URIs.
• Updated documentation with usage examples for new route constraints and unit tests.