feat: add forward+ rendering

destrum/assets_src/shaders/scene_data.glsl

@@ -6,11 +6,14 @@
 #extension GL_EXT_buffer_reference : require
 
 #include "materials.glsl"
+#include "lights.glsl"
 
+// Must match GameRenderer::GPUSceneData
 layout (buffer_reference, scalar) readonly buffer SceneDataBuffer {
     // camera
     mat4 view;
     mat4 proj;
+    mat4 invProj;
     mat4 viewProj;
     vec4 cameraPos;
 
@@ -23,6 +26,14 @@ layout (buffer_reference, scalar) readonly buffer SceneDataBuffer {
     float fogDensity;
 
     MaterialsBuffer materials;
+
+    // forward+
+    LightsBuffer lights;
+    TileLightIndicesBuffer tileLightIndices;
+    uint numLights;
+    uint tileCountX;
+    uint debugLightHeatmap;
+    uint padding;
 } sceneDataBuffer;
 
 #endif // SCENE_DATA_GLSL