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/runner.rs

@@ -692,6 +692,7 @@ impl AppServer {
         &mut self,
         build_id: BuildId,
         aslr_reference: Option<u64>,
+        pid: Option<u32>,
     ) {
         match build_id {
             BuildId::CLIENT => {
@@ -701,6 +702,9 @@ impl AppServer {
                     if let Some(aslr_reference) = aslr_reference {
                         self.client.aslr_reference = Some(aslr_reference);
                     }
+                    if let Some(pid) = pid {
+                        self.client.pid = Some(pid);
+                    }
                 }
             }
             BuildId::SERVER => {
@@ -970,6 +974,24 @@ impl AppServer {
 
         server.compiled_crates as f64 / server.expected_crates as f64
     }
+
+    pub(crate) async fn open_debugger(&mut self, dev: &WebServer, build: BuildId) {
+        if self.use_hotpatch_engine {
+            tracing::warn!("Debugging symbols might not work properly with hotpatching enabled. Consider disabling hotpatching for debugging.");
+        }
+
+        match build {
+            BuildId::CLIENT => {
+                _ = self.client.open_debugger(dev).await;
+            }
+            BuildId::SERVER => {
+                if let Some(server) = self.server.as_mut() {
+                    _ = server.open_debugger(dev).await;
+                }
+            }
+            _ => {}
+        }
+    }
 }
 
 /// Bind a listener to any point and return it