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-ndarray/src/lib.rs

@@ -0,0 +1,29 @@
+#![cfg_attr(not(feature = "std"), no_std)]
+#![warn(missing_docs)]
+#![cfg_attr(docsrs, feature(doc_cfg))]
+
+//! Burn ndarray backend.
+
+#[cfg(any(
+    feature = "blas-netlib",
+    feature = "blas-openblas",
+    feature = "blas-openblas-system",
+))]
+extern crate blas_src;
+
+mod backend;
+mod element;
+mod ops;
+mod parallel;
+mod rand;
+mod sharing;
+mod storage;
+mod tensor;
+
+pub use backend::*;
+pub use element::*;
+pub(crate) use sharing::*;
+pub(crate) use storage::*;
+pub use tensor::*;
+
+extern crate alloc;