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-std/Cargo.toml

@@ -0,0 +1,57 @@
+[package]
+authors = ["Dilshod Tadjibaev (@antimora)"]
+categories = []
+description = "Core types and utilities shared across the Burn ecosystem."
+documentation = "https://docs.rs/burn-std"
+edition.workspace = true
+keywords = []
+license.workspace = true
+name = "burn-std"
+readme.workspace = true
+repository = "https://github.com/tracel-ai/burn/tree/main/crates/burn-std"
+version.workspace = true
+
+[lints]
+workspace = true
+
+[features]
+cubecl = ["dep:cubecl"]
+default = ["std", "cubecl-common/default"]
+doc = ["default"]
+std = ["cubecl-common/std", "num-traits/std"]
+tracing = ["cubecl?/tracing", "cubecl-common/tracing"]
+
+network = ["dep:indicatif", "dep:reqwest", "dep:tokio"]
+
+[dependencies]
+bytemuck = { workspace = true, features = ["extern_crate_alloc"] }
+half = { workspace = true, features = ["bytemuck"] }
+num-traits = { workspace = true }
+serde = { workspace = true }
+smallvec = { workspace = true, features = ["serde"] }
+
+cubecl = { workspace = true, optional = true, default-features = false }
+cubecl-common = { workspace = true, default-features = false, features = [
+    "serde",
+    "shared-bytes",
+] }
+cubecl-zspace = { workspace = true, default-features = false }
+# Enable extra-platforms for portable-atomic support on targets without native atomics (e.g., thumbv6m)
+# This is needed because cubecl-common's shared-bytes feature pulls in bytes
+bytes = { workspace = true }
+
+# Network downloader
+indicatif = { workspace = true, optional = true }
+reqwest = { workspace = true, optional = true }
+tokio = { workspace = true, optional = true }
+
+[dev-dependencies]
+dashmap = { workspace = true }
+
+# Enable extra-platforms for bytes on targets without native atomics (e.g., thumbv6m-none-eabi)
+[target.'cfg(not(target_has_atomic = "ptr"))'.dependencies]
+bytes = { workspace = true, features = ["extra-platforms"] }
+
+[package.metadata.docs.rs]
+features = ["doc"]
+rustdoc-args = ["--cfg", "docsrs"]