Desktop: Add support for opening files through the already-running instance via a local socket (#4123)

* Desktop: Forward file-open args from a second launch to the running instance

Also adds socket infrastructure that can be used in the future to allow dispatching actions from another process

* Use socket instead of ipc terminologie

* Fix

* Fix

* Better pipe name on windows

desktop/src/event.rs

@@ -9,8 +9,7 @@ pub(crate) enum AppEvent {
 	DesktopWrapperMessage(DesktopWrapperMessage),
 	NodeGraphExecutionResult(NodeGraphExecutionResult),
 	Exit,
-	#[cfg(target_os = "macos")]
-	AddLaunchDocuments(Vec<std::path::PathBuf>),
+	OpenFiles(Vec<std::path::PathBuf>),
 	#[cfg(target_os = "macos")]
 	MenuEvent {
 		id: String,