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/autodiff/mod.rs

@@ -0,0 +1,74 @@
+#[allow(unused_imports)] // required for re-included modules
+pub use super::*;
+
+mod abs;
+mod adaptive_avgpool1d;
+mod adaptive_avgpool2d;
+mod add;
+mod aggregation;
+mod avgpool1d;
+mod avgpool2d;
+mod backward;
+mod bridge;
+mod broadcast;
+mod cast;
+mod cat;
+mod ceil;
+mod checkpoint;
+mod complex;
+mod conv1d;
+mod conv2d;
+mod conv3d;
+mod conv_transpose1d;
+mod conv_transpose2d;
+mod conv_transpose3d;
+mod cross;
+mod cross_entropy;
+mod cummax;
+mod cummin;
+mod cumprod;
+mod cumsum;
+mod deform_conv2d;
+mod div;
+mod erf;
+mod exp;
+mod expand;
+mod flip;
+mod floor;
+mod gather_scatter;
+mod gelu;
+mod gradients;
+mod log;
+mod log1p;
+mod log_sigmoid;
+mod mask;
+mod matmul;
+mod maxmin;
+mod maxpool1d;
+mod maxpool2d;
+mod memory_management;
+mod mul;
+mod multithread;
+mod nearest_interpolate;
+mod neg;
+mod nonzero;
+mod permute;
+mod pow;
+mod recip;
+mod relu;
+mod remainder;
+mod repeat_dim;
+mod reshape;
+mod round;
+mod select;
+mod sigmoid;
+mod sign;
+mod slice;
+mod slice_assign;
+mod softmax;
+mod sort;
+mod sqrt;
+mod sub;
+mod transpose;
+mod trig;
+mod unfold;