Implemented roles and action timestamps. Added oermissions selector and interfaces

Moonlight.Api/Database/Entities/Role.cs

@@ -0,0 +1,24 @@
+using System.ComponentModel.DataAnnotations;
+using Moonlight.Api.Database.Interfaces;
+
+namespace Moonlight.Api.Database.Entities;
+
+public class Role : IActionTimestamps
+{
+    public int Id { get; set; }
+
+    [MaxLength(15)]
+    public required string Name { get; set; }
+    
+    [MaxLength(100)]
+    public required string Description { get; set; }
+
+    public string[] Permissions { get; set; } = [];
+    
+    // Relations
+    public List<RoleMember> Members { get; set; } = [];
+    
+    // Action timestamps
+    public DateTimeOffset CreatedAt { get; set; }
+    public DateTimeOffset UpdatedAt { get; set; }
+}