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-rocm/Cargo.toml

@@ -0,0 +1,42 @@
+[package]
+authors = ["nathanielsimard <nathaniel.simard.42@gmail.com>"]
+categories = ["science"]
+description = "ROCm HIP backend for the Burn framework"
+edition.workspace = true
+keywords = ["deep-learning", "machine-learning", "gpu", "rocm", "hip"]
+license.workspace = true
+name = "burn-rocm"
+readme.workspace = true
+repository = "https://github.com/tracel-ai/burn/tree/main/crates/burn-rocm"
+documentation = "https://docs.rs/burn-rocm"
+version.workspace = true
+
+[lints]
+workspace = true
+
+[features]
+default = ["fusion", "burn-cubecl/default", "cubecl/default"]
+tracing = [
+    "cubecl/tracing",
+    "burn-cubecl/tracing",
+    "burn-backend/tracing",
+    "burn-fusion?/tracing",
+]
+
+fusion = ["burn-fusion", "burn-cubecl/fusion"]
+autotune = ["burn-cubecl/autotune"]
+autotune-checks = ["burn-cubecl/autotune-checks"]
+doc = ["burn-cubecl/doc"]
+std = ["burn-cubecl/std", "cubecl/std"]
+
+[dependencies]
+cubecl = { workspace = true, features = ["hip"] }
+burn-cubecl = { path = "../burn-cubecl", version = "=0.21.0-pre.2", default-features = true }
+burn-backend = { path = "../burn-backend", version = "=0.21.0-pre.2", features = [
+    "cubecl-hip",
+] }
+burn-fusion = { path = "../burn-fusion", version = "=0.21.0-pre.2", optional = true }
+
+[package.metadata.docs.rs]
+features = ["doc"]
+rustdoc-args = ["--cfg", "docsrs"]

crates/stable-diffusion-burn/burn-crates/burn-rocm/README.md

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+# burn-rocm
+
+Backend using ROCm HIP runtime.
+
+To execute the tests for this backend set an environment variable called `ROCM_PATH` or `CUBECL_ROCM_PATH` to the installation path of ROCm. It is often `/opt/rocm`.
+
+For now this backend requires the version `6.2.2` of ROCm or a compatible version.

crates/stable-diffusion-burn/burn-crates/burn-rocm/src/lib.rs

@@ -0,0 +1,14 @@
+#![cfg_attr(docsrs, feature(doc_cfg))]
+extern crate alloc;
+
+use burn_cubecl::CubeBackend;
+
+pub use cubecl::hip::AmdDevice as RocmDevice;
+
+use cubecl::hip::HipRuntime;
+
+#[cfg(not(feature = "fusion"))]
+pub type Rocm<F = f32, I = i32, B = u8> = CubeBackend<HipRuntime, F, I, B>;
+
+#[cfg(feature = "fusion")]
+pub type Rocm<F = f32, I = i32, B = u8> = burn_fusion::Fusion<CubeBackend<HipRuntime, F, I, B>>;