feat: dump and load xmodels for IW5 via template

src/ObjCommon/Game/IW5/XModel/JsonXModelIW5.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "Json/JsonCommon.h"
+#include <cstdint>
+#include <memory>
+#include <optional>
+#include <string>
+#include <vector>
+
+namespace IW5
+{
+    class JsonXModelLod
+    {
+    public:
+        std::string file;
+        float distance;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonXModelLod, file, distance);
+
+    class JsonXModel
+    {
+    public:
+        std::vector<JsonXModelLod> lods;
+        std::optional<int> collLod;
+        std::optional<std::string> physPreset;
+        std::optional<std::string> physCollmap;
+        uint8_t flags;
+    };
+
+    NLOHMANN_DEFINE_TYPE_EXTENSION(JsonXModel, lods, collLod, physPreset, physCollmap, flags);
+} // namespace IW5

src/ObjCommon/Game/IW5/XModel/XModelConstantsIW5.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "Game/IW5/IW5.h"
+
+namespace IW5
+{
+    inline const char* HITLOC_NAMES[]{
+        // clang-format off
+        "none",
+        "helmet",
+        "head",
+        "neck",
+        "torso_upper",
+        "torso_lower",
+        "right_arm_upper",
+        "left_arm_upper",
+        "right_arm_lower",
+        "left_arm_lower",
+        "right_hand",
+        "left_hand",
+        "right_leg_upper",
+        "left_leg_upper",
+        "right_leg_lower",
+        "left_leg_lower",
+        "right_foot",
+        "left_foot",
+        "gun",
+        "shield",
+        // clang-format on
+    };
+    static_assert(std::extent_v<decltype(HITLOC_NAMES)> == HITLOC_COUNT);
+} // namespace IW5