feat(particles): integrate WebGPU for particle background rendering and enhance PocketBase auth handling

- Replaced the existing canvas-based particle rendering with a WebGPU implementation for improved performance and visual quality.
- Updated the PocketBase authentication handling to prevent server-side rendering hangs when the auth cookie is absent or invalid.
- Enhanced cookie management in the logout process to ensure secure handling based on the request protocol.
- Added the `typegpu` dependency to support the new rendering approach.

package.json

@@ -34,6 +34,7 @@
 	"dependencies": {
 		"clsx": "^2.1.1",
 		"pocketbase": "^0.26.8",
+		"typegpu": "^0.10.2",
 		"svelte-sonner": "^1.0.7",
 		"tailwind-merge": "^3.4.1"
 	}