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-vision/src/base.rs

@@ -0,0 +1,19 @@
+use derive_new::new;
+
+/// 2D size used for vision ops.
+#[derive(new, Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub struct Size {
+    /// Width of the element
+    pub width: usize,
+    /// Height of the element
+    pub height: usize,
+}
+
+/// 2D Point used for vision ops. Coordinates start at the top left.
+#[derive(new, Clone, Copy, Debug, PartialEq, Eq, Hash)]
+pub struct Point {
+    /// X (horizontal) coordinate
+    pub x: usize,
+    /// Y (vertical) coordinate
+    pub y: usize,
+}