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-dataset/README.md

@@ -0,0 +1,17 @@
+# Burn Dataset
+
+> [Burn](https://github.com/tracel-ai/burn) dataset library
+
+[![Current Crates.io Version](https://img.shields.io/crates/v/burn-dataset.svg)](https://crates.io/crates/burn-dataset)
+[![license](https://shields.io/badge/license-MIT%2FApache--2.0-blue)](https://github.com/tracel-ai/burn-dataset/blob/master/README.md)
+
+The Burn Dataset library is designed to streamline your machine learning (ML) data pipeline creation
+process. It offers a variety of dataset implementations, transformation functions, and data sources.
+
+## Feature Flags
+
+- `audio` - enables audio dataset (SpeechCommandsDataset). Run the following example to try it out:
+
+  ```shell
+  cargo run --example speech_commands --features audio
+  ```