System: Implement PINE server

src/core/pine_server.h

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2002-2024 PCSX2 Dev Team, Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: LGPL-3.0+
+
+/* A reference client implementation for interfacing with PINE is available
+ * here: https://code.govanify.com/govanify/pine/ */
+
+#pragma once
+
+namespace PINEServer {
+bool IsRunning();
+bool Initialize(u16 slot);
+void Shutdown();
+} // namespace PINEServer