docs: update README with new Rust frontend and fix TypeScript version

- Updated README.md to reflect the addition of a native Rust frontend using egui
- Added setup instructions for the new rust-frontend directory
- Modified frontend package.json to downgrade TypeScript version from 5.3.3 to 4.9.5 due to conflicts
- Updated path references in documentation from ComfyUI-Rust/ to direct paths
- Reorganized project structure documentation to distinguish between original and new frontends

rust-frontend/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "comfyui-rust-frontend"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+eframe = "0.24"
+egui = "0.24"
+egui_extras = "0.24"
+reqwest = { version = "0.11", features = ["json"] }
+tokio = { version = "1", features = ["full"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+image = "0.24"
+thiserror = "1.0"
+
+[dependencies.comfyui-backend]
+path = "../backend"