feat(rendering): add default checkerboard texture

src/texture.rs

@@ -85,3 +85,24 @@ impl Texture {
         })
     }
 }
+
+pub fn create_checkerboard() -> image::DynamicImage {
+    let size = 512;
+    let tile_size = 24;
+    let mut img = image::RgbaImage::new(size, size);
+
+    for y in 0..size {
+        for x in 0..size {
+            let tile_x = x / tile_size;
+            let tile_y = y / tile_size;
+            let color = if (tile_x + tile_y) % 2 == 0 {
+                [0, 0, 0, 255]
+            } else {
+                [255, 5, 255, 255]
+            };
+            img.put_pixel(x, y, image::Rgba(color));
+        }
+    }
+
+    image::DynamicImage::ImageRgba8(img)
+}