feat: add legal opinions admin management

app/Models/Art.php

@@ -53,6 +53,11 @@ class Art extends Model
         return $this->belongsToMany(JudicialPrecedent::class, 'art_judicial_precedent');
     }
 
+    public function legalOpinions()
+    {
+        return $this->belongsToMany(LegalOpinion::class, 'art_legal_opinion');
+    }
+
     public static function search($searchTerm)
     {
         return self::where('title', 'LIKE', "%{$searchTerm}%")

app/Models/LegalOpinion.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class LegalOpinion extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'opinion_number',
+        'opinion_date',
+        'subject',
+        'full_text',
+        'issuing_authority',
+        'category_id',
+    ];
+
+    protected $hidden = ['created_at', 'updated_at'];
+
+    public function arts()
+    {
+        return $this->belongsToMany(Art::class, 'art_legal_opinion');
+    }
+
+    public function category()
+    {
+        return $this->belongsTo(LegalOpinionCategory::class, 'category_id');
+    }
+}

app/Models/LegalOpinionCategory.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class LegalOpinionCategory extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['name'];
+
+    public function legalOpinions()
+    {
+        return $this->hasMany(LegalOpinion::class, 'category_id');
+    }
+}