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/python/stablediffusion.py

@@ -0,0 +1,14 @@
+import pathlib
+from autoencoder import save_autoencoder
+from unet import save_unet_model
+from clip import save_clip_text_transformer
+
+from save import save_scalar, save_tensor
+
+def save_stable_diffusion(stable_diffusion, path):
+    pathlib.Path(path).mkdir(parents=True, exist_ok=True)
+    save_scalar(stable_diffusion.alphas_cumprod.shape[0], "n_steps", path)
+    save_tensor(stable_diffusion.alphas_cumprod, 'alphas_cumprod', path)
+    save_autoencoder(stable_diffusion.first_stage_model, pathlib.Path(path, 'autoencoder'))
+    save_unet_model(stable_diffusion.model.diffusion_model, pathlib.Path(path, 'unet'))
+    save_clip_text_transformer(stable_diffusion.cond_stage_model.transformer.text_model, pathlib.Path(path, 'clip'))