Update project dependencies and configuration

- Added Filament and Tailwind CSS dependencies in composer.json.
- Updated AGENTS.md to include new package versions.
- Modified boost.json to include tailwindcss-development skill.
- Updated DatabaseSeeder to create an admin user with a password.
- Changed the root route to use HomeController instead of a closure.
- Adjusted permissions for .gitignore in storage directory.

app/Models/Category.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class Category extends Model
+{
+    protected $fillable = ['name', 'icon', 'order'];
+
+    public function products(): HasMany
+    {
+        return $this->hasMany(Product::class);
+    }
+}