feat: Init of Tauri application with system tray support and configuration

- Added main.rs to set up the Tauri application with a system tray.
- Implemented a basic application state management using Mutex.
- Created a system tray menu with options for "Settings" and "Quit".
- Configured tauri.conf.json with application metadata and window settings.

src-tauri/tauri.conf.json

@@ -0,0 +1,34 @@
+{
+  "productName": "ai-translater-client",
+  "version": "0.1.0",
+  "identifier": "com.ai-translater.client",
+  "build": {
+    "beforeDevCommand": "",
+    "beforeBuildCommand": "",
+    "frontendDist": "../dist"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "AI Typist Inställningar",
+        "width": 800,
+        "height": 600,
+        "visible": false 
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ]
+  }
+}