evaluate whether it is worth switching from build-runner to frontend-server

[sigmundch]

As mentioned in dart-lang/sdk#50664 (comment) we may want to consider whether it makes sense for webdev to switch to use a front-end-server solution for all uses, and not just for flutter.

There are many open questions to consider:

• analyze the tradeoffs between the two
• how to support sourcegen?
• how to centralize frontend server and expose it from the Dart SDK

[elliette]

Related: #1591

If we switch to only using the FrontendServer (or even if we don't) I think it would make sense for the FrontendServer to be responsible for generating the necessary dill & JS files, instead of Flutter doing so.

[anujcontractor]

Related to issue #1827

This could have many potential benefits, such as improved performance and scalability. However, there are also trade-offs to consider, such as the added complexity of implementing and maintaining a front-end-server, and how it would impact the development workflow.

It is also important to consider how to support sourcegen, as well as how to centralize the front-end server and make it accessible from the Dart SDK.

[bkonyi]

We should definitely look into this if it means we can remove the remaining uses of build_runner.