debugger support for dx (#3814)

* add vscode debugger for apps

* todo: need to disconnect when rebuilding

* update debugger

* add uri handler to remote launch the debugger

* attach

* dont panic

* fixed it - hung processes are not errors

* wip: android debugger

* clean it up a bit

* revert ios stdout/stderr

* wire up pid from ios

* use target family instead of target_arch

* fix android

* bring back softkill

* typo

packages/cli/src/serve/update.rs

@@ -10,6 +10,7 @@ pub(crate) enum ServeUpdate {
     NewConnection {
         id: BuildId,
         aslr_reference: Option<u64>,
+        pid: Option<u32>,
     },
     WsMessage {
         platform: Platform,
@@ -32,6 +33,10 @@ pub(crate) enum ServeUpdate {
 
     ToggleShouldRebuild,
 
+    OpenDebugger {
+        id: BuildId,
+    },
+
     Redraw,
 
     TracingLog {