Update dotnet watch to support running .NET Aspire AppHost projects

[DamianEdwards]

In order to properly watch .NET Aspire AppHost projects, dotnet watch needs to implement the IDE execution spec. This ensures that the AppHost process can coordinate with dotnet watch to manage the lifecycle of projects composed into the AppHost as resources.

[danmoseley]

@vijayrkn do you know who owns this , and next action here -- is it your team?

[danmoseley]

for my own future reference, per offline discussion @tmat owns this area and is looking at it.

[danmoseley]

@tmat could you give an update -- is it possible to set expectations? I hear this is significant work, to handle the DCP protocol etc.

[lcorneliussen]

So, using the Aspire Sample with the Blazor App, there is no way around restarting the whole thing to see some html change?

[danmoseley]

linking dotnet/aspire#1008

[danmoseley]

Noting here that work is actively in progress

[balachir]

@tmat did this work get completed in the SDK? I'm wondering whether we should re-validate the scenarios in dotnet/aspire#633 and dotnet/aspire#1008 for Aspire P5.

cc: @DamianEdwards @danmoseley

[abbottdev]

Any updates to share on this one? It's been 4/5 months since the last comment @danmoseley 😄

[KennethHoff]

It's now been more than 8 months since the last comment @danmoseley. Any updates?

dotnet/aspire#1008 (comment) seems to imply it's coming in an upcoming .Net 9 update; is this true, or is that just a subset of the issue?