[Feature] Add support for plain URL route matching

[noemi-salaun]

When using legacy templating solution, you'll find many href or form action that target plain url.

This plugin is already capable of finding routes by their Symfony name in twig template but not plain URL in html.

The symfony command ./bin/console router:match /my/route already provide the right information

[Haehnchen]

yes, its really annoying sometimes, plugin knows must cases, i will try to find if there is any extension point to hide this external warning