Add secondary/legacy route feature that allows routes to match URLs
without being used for generation. Useful for supporting alternative
or legacy URLs without polluting the Named Route space with duplicates.

Also provide a simple Route Builder interface for more robust route definition.
A new Route Analyzer tool detects some cases of unreachable routes through conflicts.

Design philosophy emphasizes no false positives. Incremental approach.
New features are only available in the src/ branch and through the PSR-7 request interface.
Legacy Horde_Controller interface is for BC only.

Modernize Routes encoding to match contemporary PHP routers (Symfony,
Laravel, FastRoute). Remove UTF-8→ISO-8859-1 conversion, rely on PHP 8 native UTF-8 support.
All routes now get an automatically generated name if no name was provided.
test(routes): add comprehensive PSR-style API test coverage

feat: Add native PSR-7 UriInterface support for modern PHP interoperability.
Routes now provides *Uri() methods returning Uri objects alongside
existing string methods, maintaining 100% backward compatibility.