RouteGroup

Overview:

RouteGroup is a helper for grouping routes, letting you apply before, after, and push to multiple routes at once.

Use RouteGroup to apply shared middleware and response hints across multiple routes without repeating each call.

Public API:

• new RouteGroup() creates and registers the group.
• add($route) attaches a route to the group.
• remove($route) detaches a route.
• before($callbacks) applies before middleware to all routes.
• after($callbacks) applies after middleware to all routes.
• push($links, $type = 'text') applies HTTP/2 push to all routes.