feat: update to burn 0.14.0 with vulkan support and refactor frontend to egui

- Updated burn framework dependencies from 0.21.0-pre.2 to 0.14.0
- Added optional vulkan backend support with burn-wgpu feature
- Replaced React/TypeScript frontend with native Rust egui frontend
- Added Vulkan GPU support documentation and setup instructions
- Updated README with new architecture and backend configuration
- Refactored GPU backend detection and reporting to include backend type
- Added vulkan-backend feature flag for conditional compilation
- Updated dependency installation instructions for Vulkan support

backend/Cargo.toml

@@ -5,6 +5,8 @@ edition = "2021"
 
 [dependencies]
 actix-web = { version = "4", features = ["openssl"] }
+actix-multipart = "0.6"
+futures-util = "0.3"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 tokio = { version = "1", features = ["full"] }
@@ -15,6 +17,23 @@ env_logger = "0.10"
 thiserror = "1.0"
 regex = "1.0"
 chrono = { version = "0.4", features = ["serde"] }
+eframe = "0.24"
+egui = "0.24"
+egui_extras = "0.24"
+reqwest = { version = "0.11", features = ["json"] }
+image = "0.24"
+
+# For model loading capabilities - using burn framework
+burn = { version = "0.14.0", default-features = false }
+burn-tch = { version = "0.14.0" }
+burn-wgpu = { version = "0.14.0", features = ["vulkan"], optional = true }
+tch = "0.15.0"
+
+# Stable Diffusion using burn
+stablediffusion = { path = "../../../stable-diffusion-burn" }
+
+[features]
+vulkan-backend = ["burn-wgpu"]
 
 [dev-dependencies]
 tokio-test = "0.4"