[DX] Ease rounting generation by refering to routes by FQCN

[backbone87]

Insteadof $urlGenerator->generate('long_route_name_possibly_autogenerated', $params) maybe its possible to provide something like:

• $urlGenerator->generate(MyAction::class, $params)
• $urlGenerator[MyAction::class]($params)
• $myAction->route($params)

Possible implementation strategies:

• Decorate route loader to register 2 routes (one named with autogenerated name, one with FQCN as route name) for __invokeable controllers
• Decorate UrlGenerator to generate route name from args that match a FQCN (if($classLoader->exists($routeName)) $routeName = $this->getDefaultRouteName($routeName);)
• Keep a map in UrlGenerator to map route names (if($this->routeMap[$routeName]) $routeName = $this->routeMap[$routeName];)

WDYT?