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/multinode-tests/Cargo.toml

@@ -0,0 +1,34 @@
+[package]
+name = "burn-collective-multinode-tests"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[features]
+default = ["ndarray"]
+ndarray = ["burn/ndarray"]
+
+[dependencies]
+burn = { path = "../../burn", default-features = false, features = ["std"] }
+burn-std = { path = "../../burn-std", default-features = false }
+burn-collective = { path = "..", features = ["orchestrator"] }
+burn-communication = { path = "../../burn-communication" }
+
+tokio = { workspace = true, features = ["rt-multi-thread", "process"] }
+
+serde = { workspace = true, features = ["derive"] }
+serde_json = { workspace = true }
+interprocess = "2.3.1"
+rmp-serde = { workspace = true }
+tokio-util = { workspace = true, features = ["codec"] }
+tokio-serde = { version = "0.9.0", features = ["messagepack"] }
+futures = { workspace = true }
+
+
+[[bin]]
+name = "global"
+path = "src/bin/global.rs"
+
+[[bin]]
+name = "node"
+path = "src/bin/node.rs"