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/examples/speech_commands.rs

@@ -0,0 +1,23 @@
+#[cfg(feature = "audio")]
+use burn_dataset::{Dataset, audio::SpeechCommandsDataset};
+
+#[cfg(feature = "audio")]
+fn speech_command() {
+    let index: usize = 4835;
+    let test = SpeechCommandsDataset::test();
+    let item = test.get(index).unwrap();
+
+    println!("Item: {:?}", item);
+    println!("Item Length: {:?}", item.audio_samples.len());
+    println!("Label: {}", item.label);
+
+    assert_eq!(test.len(), 4890);
+    assert_eq!(item.label.to_string(), "Yes");
+    assert_eq!(item.sample_rate, 16000);
+    assert_eq!(item.audio_samples.len(), 16000);
+}
+
+fn main() {
+    #[cfg(feature = "audio")]
+    speech_command()
+}