feat: add music feature

app/Models/MusicPlaylist.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class MusicPlaylist extends Model
+{
+    protected $table = 'music_playlists';
+    
+    protected $fillable = [
+        'category_id', 'name', 'slug', 'description', 'image_id', 'order', 'is_active'
+    ];
+    
+    protected $casts = [
+        'is_active' => 'boolean',
+        'order' => 'integer',
+    ];
+    
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(MusicCategory::class, 'category_id');
+    }
+    
+    public function musics(): HasMany
+    {
+        return $this->hasMany(Music::class, 'playlist_id');
+    }
+    
+    public function image(): BelongsTo
+    {
+        return $this->belongsTo(Image::class);
+    }
+    
+    public function getActiveMusicsAttribute()
+    {
+        return $this->musics()->where('is_active', true)->orderBy('order')->get();
+    }
+    
+    public function getTotalDurationAttribute()
+    {
+        return $this->musics()->where('is_active', true)->sum('duration');
+    }
+}