feat: enhance application functionality and telemetry monitoring

- Added new scripts in `package.json` for Python dependency installation and sidecar compilation.
- Integrated telemetry fetching in `src/App.tsx` to monitor CPU, RAM, GPU, and disk usage.
- Implemented model downloading functionality with progress tracking in `src/App.tsx`.
- Updated `Footer` and `Header` components to display telemetry data and settings options.
- Enhanced Tauri configuration for sidecar execution and application window settings.
- Updated Python requirements in `requirements.txt` to include additional dependencies for improved functionality.

src-tauri/capabilities/default.json

@@ -1,10 +1,19 @@
 {
   "$schema": "../gen/schemas/desktop-schema.json",
-  "identifier": "default",
+  "identifier": "main-capability",
   "description": "Capability for the main window",
   "windows": ["main"],
   "permissions": [
     "core:default",
-    "opener:default"
+    "opener:default",
+    {
+      "identifier": "shell:allow-execute",
+      "allow": [
+        {
+          "name": "binaries/engine-backend",
+          "sidecar": true
+        }
+      ]
+    }
   ]
 }