Roadmap update (Bi-di Streaming)

[sampajano]

Updates to the following threads:

• https://github.com/grpc/grpc-web/issues/24
• https://github.com/grpc/grpc-web/issues/1205
• https://github.com/grpc/grpc-web/discussions/1259

[glerchundi]

Great to see updates on the roadmap and have clear expectations. Thanks 😊

[sampajano]

Thanks for the approvals and support! 😃

[chris-kruining]

wooo! love to see it!

need any help with implentation? I've been itching for a good excuse to dive into web-transport 😁

[sampajano]

@chris-kruining Thanks for the support and offering to help!! 😃

Not quite yet but would consider it when we have more concrete plans (e.g. maybe after making an interface for custom transports)!

Thanks again! :)