Impl sceSystemServiceLoadExec (#3647)

* Add support for restarting the emulator with new configurations

- Implement `Restart` function in `Emulator` to enable process relaunch with updated parameters.
- Modify `sceSystemServiceLoadExec` to use the restart functionality.

* Add logging for emulator restart and system service load execution

* Add IPC emulator PID output command

Impl `PID` output command to return the emulator process ID
- required for launches supporting emulator restart

* Add log file append mode support (used after restarting to keep the same log file)

* Keep game root between restarts

* add --wait-for-debugger option flag

* add --wait-for-pid flag

used for sync between parent & child process during restart

* impl restart via ipc

* fix override game root

* add qt flags to allow restart

src/core/ipc/ipc.h

@@ -6,7 +6,9 @@
 #include "common/singleton.h"
 
 #include <semaphore>
+#include <string>
 #include <thread>
+#include <vector>
 
 class IPC {
     bool enabled{false};
@@ -34,6 +36,8 @@ public:
         start_semaphore.acquire();
     }
 
+    void SendRestart(const std::vector<std::string>& args);
+
 private:
     [[noreturn]] void InputLoop();
 };