GPU accelerated maskeditor rendering (#6767)

## GPU accelerated brush engine for the mask editor

- Full GPU acceleration using TypeGPU and type-safe shaders
- Catmull-Rom Spline Smoothing
- arc-length equidistant resampling
- much improved performance, even for huge images
- photoshop like opacity clamping for brush strokes
- much improved soft brushes
- fallback to CPU fully implemented, much improved CPU rendering
features as well

### Tested Browsers
- Chrome (fully supported)
- Safari 26 (fully supported, prev versions CPU fallback)
- Firefox (CPU fallback, flags needed for full support)



https://github.com/user-attachments/assets/b7b5cb8a-2290-4a95-ae7d-180e11fccdb0



https://github.com/user-attachments/assets/4297aaa5-f249-499a-9b74-869677f1c73b



https://github.com/user-attachments/assets/602b4783-3e2b-489e-bcb9-70534bcaac5e

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6767-GPU-accelerated-maskeditor-rendering-2b16d73d3650818cb294e1fca03f6169)
by [Unito](https://www.unito.io)

vite.config.mts

@@ -10,6 +10,7 @@ import { FileSystemIconLoader } from 'unplugin-icons/loaders'
 import IconsResolver from 'unplugin-icons/resolver'
 import Icons from 'unplugin-icons/vite'
 import Components from 'unplugin-vue-components/vite'
+import typegpuPlugin from 'unplugin-typegpu/vite'
 import { defineConfig } from 'vite'
 import type { ProxyOptions, UserConfig } from 'vite'
 import { createHtmlPlugin } from 'vite-plugin-html'
@@ -231,6 +232,7 @@ export default defineConfig({
       ? [vueDevTools(), vue(), createHtmlPlugin({})]
       : [vue()]),
     tailwindcss(),
+    typegpuPlugin({}),
     comfyAPIPlugin(IS_DEV),
     // Twitter/Open Graph meta tags plugin (cloud distribution only)
     {