Added First Person VR item management

- Implemented DVDReadVrAsset function to read mapped disc paths for VR assets.
- Created HeldItem structure and ReadHeldItem function for managing held items in the game.
- Developed unit tests for ReadHeldItem to ensure correct functionality and edge case handling.
- Added cockpit item data tests to validate model indexing and parsing of archives.

runtime/include/hle/dvd_vr_asset.h

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+#pragma once
+
+#include <cstdint>
+#include <vector>
+
+// Reads the same mapped disc path that the guest sees, including active file
+// replacements. Called on the guest thread after DVD initialization.
+std::vector<uint8_t> DVDReadVrAsset(const char* dvdPath);