* signing: implement signing service on the web
* wip
* cli: implement stdio service
This is used to implement the exec server for WSL. Guarded behind a signed handshake.
* update distro
* rm debug
* address pr comments
* fix: don't sync debug.lastExtensionDevelopmentWorkspace
* cli: fix attach does not always work
Seems like reading stdin when it's open but never written to blocks the process. Fix that, both by checking IS_INTERACTIVE_CLI before reading stdin, and by not passing stdin to the tunnel subprocess.
Fixes#179122
* testing: another fix to avoid automatically queuing
Fixes#180041 again
* cli: only show other interactive attach commands when in a terminal
Fixes#178091
Other connected clients will now print:
```
Connected to an existing tunnel process running on this machine. You can press:
- Ctrl+C to detach
- "x" to stop the tunnel and exit
- "r" to restart the tunnel
```
These are then sent to the server to have that take effect. This is
mostly some refactors in the singleton_server to make the lifecycle work.
