[go_router_builder] Add go_router v5 support to go_router_builder

[chunhtai]

go_router_builder should support new feature added into go_router_v5

These include

• shellRoute API
• async and buildcontext redirect.

[hawkkiller]

@chunhtai made PR flutter/packages#2672

[chunhtai]

@hawkkiller thanks!

[ClaireDavis]

Do we have any idea on when this might be supported? I'd love to start using shell routes in my enterprise app!

[lucavenir]

Will this also introduce a way to write redirect methods inside ShellRouteData? Or is it already possible to define a redirect function on shell routes?

[thipokch]

Maybe bump this up to v6?

[adamsowinski]

This is a show stopper for using go_router_builder for me.

[ClaireDavis]

Looks like this is complete? flutter/packages#2977

[lucavenir]

@ClaireDavis no it isn't; this is also about ShellRoute which - to my knowledge - isn't available to the builder. Or at least I can't find it in the docs. GoRouteData has no "shell route" option.

[ycherniavskyi]

@ClaireDavis, as @lucavenir wrote, it isn't for sure. We hope to switch to go_router_builder after mentioned PR merged, but unfortunately not. That is why for now, go_router_builder is useless if you want to get all go_router functionality.

[github-actions]

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