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-collective/Cargo.toml

@@ -0,0 +1,73 @@
+[package]
+authors = ["nathanielsimard <nathaniel.simard.42@gmail.com>"]
+categories = ["science"]
+description = "Backend extension for collective calculations."
+edition.workspace = true
+keywords = ["deep-learning", "machine-learning", "collective"]
+license.workspace = true
+name = "burn-collective"
+readme.workspace = true
+repository = "https://github.com/tracel-ai/burn/tree/main/crates/burn-collective"
+documentation = "https://docs.rs/burn-collective"
+version.workspace = true
+
+[lints]
+workspace = true
+
+[features]
+default = []
+doc = []
+tracing = [
+    "dep:tracing",
+    "burn-std/tracing",
+    "burn-tensor/tracing",
+    "burn-communication/tracing",
+    "burn-ndarray?/tracing",
+    "burn-wgpu?/tracing",
+    "burn-cuda?/tracing",
+]
+orchestrator = ["burn-communication/websocket"]
+
+# Backends for testing
+test-ndarray = ["burn-ndarray"]
+test-wgpu = ["burn-wgpu", "burn-wgpu/webgpu"]
+test-metal = ["burn-wgpu", "burn-wgpu/metal"]
+test-vulkan = ["burn-wgpu", "burn-wgpu/vulkan"]
+test-cuda = ["burn-cuda"]
+
+[dependencies]
+burn-tensor = { path = "../burn-tensor", version = "=0.21.0-pre.2", default-features = true }
+burn-std = { path = "../burn-std", version = "=0.21.0-pre.2", default-features = true }
+
+log = { workspace = true }
+
+burn-communication = { path = "../burn-communication", version = "=0.21.0-pre.2", features = [
+    "data-service",
+    "websocket",
+] }
+tokio = { workspace = true, features = [
+    "rt-multi-thread",
+    "sync",
+    "signal",
+    "time",
+    "tracing",
+] }
+serde = { workspace = true, features = ["derive"] }
+rmp-serde = { workspace = true }
+bytes = { workspace = true }
+futures = { workspace = true }
+tokio-util = { workspace = true }
+tracing = { workspace = true, optional = true }
+
+# Tests
+burn-ndarray = { path = "../burn-ndarray", version = "=0.21.0-pre.2", optional = true }
+burn-wgpu = { path = "../burn-wgpu", version = "=0.21.0-pre.2", optional = true }
+burn-cuda = { path = "../burn-cuda", version = "=0.21.0-pre.2", optional = true }
+
+[dev-dependencies]
+serial_test = { workspace = true }
+
+
+[package.metadata.docs.rs]
+features = ["doc"]
+rustdoc-args = ["--cfg", "docsrs"]