feat: update workspace paths and enhance gitignore

- Updated stablediffusion crate path from "../stable-diffusion-burn" to "./crates/stable-diffusion-burn" for proper workspace resolution
- Enhanced .gitignore to include generated model files (.mpk, .pt, .bin, .safetensors, .ckpt) and user_data directory
- Added Cargo.lock to gitignore with appropriate comment
- Reorganized IDE files section in gitignore for better clarity
- Added newline at end of file for proper formatting

crates/stable-diffusion-burn/burn-crates/burn-backend-tests/tests/cubecl/scatter.rs

@@ -0,0 +1,66 @@
+use super::*;
+use burn_tensor::{Distribution, Int, Tensor, backend::Backend};
+use burn_tensor::{IndexingUpdateOp, Tolerance};
+
+#[test]
+fn scatter_should_work_with_multiple_workgroups_2d_dim0() {
+    same_as_reference_same_shape(0, [256, 32]);
+}
+
+#[test]
+fn scatter_should_work_with_multiple_workgroups_2d_dim1() {
+    same_as_reference_same_shape(1, [32, 256]);
+}
+
+#[test]
+fn scatter_should_work_with_multiple_workgroups_3d_dim0() {
+    same_as_reference_same_shape(0, [256, 6, 6]);
+}
+
+#[test]
+fn scatter_should_work_with_multiple_workgroups_3d_dim1() {
+    same_as_reference_same_shape(1, [6, 256, 6]);
+}
+
+#[test]
+fn scatter_should_work_with_multiple_workgroups_3d_dim2() {
+    same_as_reference_same_shape(2, [6, 6, 256]);
+}
+
+#[test]
+fn scatter_should_work_with_multiple_workgroups_diff_shapes() {
+    same_as_reference_diff_shape(1, [32, 128], [32, 1]);
+}
+
+fn same_as_reference_diff_shape<const D: usize>(
+    dim: usize,
+    shape1: [usize; D],
+    shape2: [usize; D],
+) {
+    let test_device = Default::default();
+    TestBackend::seed(&test_device, 0);
+
+    let tensor = Tensor::<TestBackend, D>::random(shape1, Distribution::Default, &test_device);
+    let value = Tensor::<TestBackend, D>::random(shape2, Distribution::Default, &test_device);
+    let indices = Tensor::<TestBackend, 1, Int>::random(
+        [shape2.iter().product::<usize>()],
+        Distribution::Uniform(0., shape2[dim] as f64),
+        &test_device,
+    )
+    .reshape(shape2);
+    let ref_device = Default::default();
+    let tensor_ref = Tensor::<ReferenceBackend, D>::from_data(tensor.to_data(), &ref_device);
+    let value_ref = Tensor::<ReferenceBackend, D>::from_data(value.to_data(), &ref_device);
+    let indices_ref = Tensor::<ReferenceBackend, D, Int>::from_data(indices.to_data(), &ref_device);
+
+    let actual = tensor.scatter(dim, indices, value, IndexingUpdateOp::Add);
+    let expected = tensor_ref.scatter(dim, indices_ref, value_ref, IndexingUpdateOp::Add);
+
+    expected
+        .into_data()
+        .assert_approx_eq::<FloatElem>(&actual.into_data(), Tolerance::default());
+}
+
+fn same_as_reference_same_shape<const D: usize>(dim: usize, shape: [usize; D]) {
+    same_as_reference_diff_shape(dim, shape, shape);
+}