feat: add bylaw management features including documents, legal authorities, subject categories, and nodes

app/Models/BylawSubjectCategory.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class BylawSubjectCategory extends Model
+{
+    protected $table = 'bylaw_subject_categories';
+
+    protected $fillable = ['parent_id', 'name', 'slug', 'sort_order'];
+
+    public function parent()
+    {
+        return $this->belongsTo(self::class, 'parent_id');
+    }
+}