feat: display a handheld item in first-person view (WIP)

src/graphics/render/ModelBatch.hpp

@@ -34,6 +34,7 @@ class ModelBatch {
     Texture* texture = nullptr;
     UVRegion region {0.0f, 0.0f, 1.0f, 1.0f};
     const EngineSettings* settings;
+    glm::vec3 lightsOffset {};
 
     static inline glm::vec3 SUN_VECTOR {0.411934f, 0.863868f, -0.279161f};
 
@@ -96,4 +97,6 @@ public:
               const model::Model* model,
               const texture_names_map* varTextures);
     void render();
+
+    void setLightsOffset(const glm::vec3& offset);
 };