feat: initialize Infra Manager with React, Tailwind CSS, and Inertia.js

- Added main application entry point (app.jsx) and bootstrap file for React setup.
- Created Wiki index page (Index.jsx) for documentation and file management.
- Implemented utility functions for formatting and status handling in utils.js.
- Set up Blade template (app.blade.php) for Inertia.js integration.
- Defined API routes for metrics and terminal access in api.php.
- Established console commands for scheduled tasks in console.php.
- Created web routes for various application features including authentication, hypervisors, containers, cloud accounts, security, backups, and wiki management in web.php.
- Developed setup scripts for Windows (setup.ps1) and Linux (setup.sh) environments.
- Configured Tailwind CSS for styling with custom themes and animations in tailwind.config.js.
- Set up Vite for asset bundling and development server in vite.config.js.

app/Models/BackupPolicy.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class BackupPolicy extends Model
+{
+    protected $fillable = [
+        'name', 'target_type', 'target_ids', 'schedule', 'retention_type', 'retention_value',
+        'storage_type', 'storage_config', 'is_active', 'compression', 'encryption', 'created_by',
+    ];
+    protected $casts = ['target_ids' => 'array', 'storage_config' => 'array', 'compression' => 'array', 'encryption' => 'array', 'is_active' => 'boolean'];
+    public function backups() { return $this->hasMany(Backup::class, 'policy_id'); }
+}