feat: Windows Setup Wizard (ostp-setup) with Tauri

- Tauri 2.0 based graphical installer
- Access Key parsing with AES-256-GCM encryption
- Windows Service installation via sc.exe
- WinTUN driver extraction from embedded resources
- System requirements checking (admin, AES-NI, OS version)
- Modern dark UI with step-by-step wizard flow
- Country/region selection for SNI mimicry

ostp-setup/tauri.conf.json

@@ -0,0 +1,40 @@
+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "OSTP Setup",
+  "version": "0.1.0",
+  "identifier": "network.ospab.ostp-setup",
+  "build": {
+    "beforeDevCommand": "",
+    "devUrl": "http://localhost:1420",
+    "beforeBuildCommand": "",
+    "frontendDist": "./ui"
+  },
+  "app": {
+    "withGlobalTauri": true,
+    "windows": [
+      {
+        "title": "Ospab Network - Setup Wizard",
+        "width": 600,
+        "height": 480,
+        "resizable": false,
+        "center": true,
+        "decorations": true,
+        "transparent": false
+      }
+    ],
+    "security": {
+      "csp": "default-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' asset: https://asset.localhost data:"
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": ["nsis"],
+    "icon": [],
+    "resources": ["resources/*"]
+  },
+  "plugins": {
+    "shell": {
+      "open": true
+    }
+  }
+}