Refactor navigation icon declarations in various resources for consistency; enhance Group model with new relationships and fillable properties; update Hotel and Pilgrim models with fillable attributes; improve table configurations across resources.

app/Models/Program.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Program extends Model
+{
+    /** @use HasFactory<\Database\Factories\ProgramFactory> */
+    use HasFactory;
+
+    protected $fillable = [
+        'group_id',
+        'days',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'days' => 'array',
+        ];
+    }
+
+    public function group(): BelongsTo
+    {
+        return $this->belongsTo(Group::class);
+    }
+}