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/cast.rs

@@ -0,0 +1,45 @@
+use super::*;
+use burn_tensor::{Int, Tensor, TensorData};
+
+#[test]
+fn should_cast_int_to_float() {
+    const START: usize = 0;
+    const END: usize = 100;
+
+    let device = Default::default();
+    let tensor = Tensor::<TestBackend, 1, Int>::arange(START as i64..END as i64, &device);
+
+    let data_int = tensor.to_data();
+    let data_int = data_int.as_slice::<i32>().unwrap();
+    let data_float = tensor.float().into_data();
+    let data_float = data_float.as_slice::<f32>().unwrap();
+
+    for i in START..END {
+        assert_eq!(data_int[i], i as i32);
+        assert_eq!(data_float[i], i as f32);
+    }
+}
+
+#[test]
+fn should_cast_bool_to_int() {
+    let device = Default::default();
+
+    let tensor_1 = Tensor::<TestBackend, 2>::from_floats([[1., 0., 3.], [0., 0., 900.]], &device);
+    let tensor_2: Tensor<TestBackend, 2, Int> = tensor_1.clone().greater_elem(0.0).int();
+
+    tensor_2
+        .to_data()
+        .assert_eq(&TensorData::from([[1, 0, 1], [0, 0, 1]]), false);
+}
+
+#[test]
+fn should_cast_bool_to_float() {
+    let device = Default::default();
+
+    let tensor_1 = Tensor::<TestBackend, 2>::from_floats([[1., 0., 3.], [0., 0., 900.]], &device);
+    let tensor_2: Tensor<TestBackend, 2> = tensor_1.clone().greater_elem(0.0).float();
+
+    tensor_2
+        .to_data()
+        .assert_eq(&TensorData::from([[1., 0., 1.], [0., 0., 1.]]), false);
+}