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/contiguous.rs

@@ -0,0 +1,40 @@
+use super::*;
+use burn_tensor::Tolerance;
+use burn_tensor::{Int, Tensor};
+
+#[test]
+pub fn into_contiguous_match_reference_backend_1() {
+    for shape in [
+        [4, 4, 4, 4],
+        [32, 42, 24, 48],
+        [8, 3, 7, 4],
+        [1, 4, 1, 1],
+        [1, 32, 256, 128],
+    ] {
+        let num_elems = shape.iter().product::<usize>() as i64;
+        let tensor: Tensor<TestBackend, 4> =
+            Tensor::<TestBackend, 1, Int>::arange(0..num_elems, &Default::default())
+                .reshape(shape)
+                .float();
+        let tensor_ref =
+            Tensor::<ReferenceBackend, 4>::from_data(tensor.to_data(), &Default::default());
+
+        for (i, j) in get_combinations(shape.len()) {
+            let view = tensor.clone().swap_dims(i, j);
+            let view_ref = tensor_ref.clone().swap_dims(i, j);
+            let data = view.into_data();
+            let data_ref = view_ref.into_data();
+
+            data_ref.assert_approx_eq::<FloatElem>(&data, Tolerance::default());
+        }
+    }
+}
+
+fn get_combinations(n: usize) -> impl Iterator<Item = (usize, usize)> {
+    // Iterate from 0 up to n
+    (0..n).flat_map(move |i| {
+        // For each i, iterate from i + 1 up to n
+        // This ensures no repeats (i == j) and no duplicates (j, i)
+        (i + 1..n).map(move |j| (i, j))
+    })
+}