Show message while workspace is starting

It would be nice if we can show a separate "starting workspace" message while starting a workpsace. Currently we immediately launch into SSH which shows "connecting to remote host" so if we have to wait for the workspace start as well it makes that step seem extra long.

Thinking something like this, where we would have to implement `waitForBuild` with a web socket:

```kotlin
CoderRemoteConnectionHandle().connect { indicator ->
if (listOf(WorkspaceStatus.STOPPED, WorkspaceStatus.CANCELED, WorkspaceStatus.FAILED).contains(workspace.latestBuild.status)) {
val build = client.startWorkspace(workspace)
indicator.text = "Starting workspace..."
client.waitForBuild(build)
}
workspaceProjectIDE
}
```