Migrate backend to Porto architecture and fix minor bugs

- Fully transitioned the backend to the Porto architectural pattern
- Improved code organization and maintainability
- Fixed minor bugs and inconsistencies

app/Containers/AppStructure/Models/SubSection.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Containers\AppStructure\Models;
+
+use App\Ship\Models\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class SubSection extends Model
+{
+    use HasFactory;
+
+    protected $guarded = false;
+
+    public function mainSection() : BelongsTo
+    {
+        return $this->belongsTo(MainSection::class);
+    }
+
+    public function pages() : HasMany
+    {
+        return $this->hasMany(Page::class);
+    }
+}